"Thorax porcellana Thorax porcellana Saussure is a species of epilamprid cockroach occurring in Sri Lanka and India. Both sexes are fully winged, but only the male takes flight, and then rarely and on short flights. Louis M. Roth speculated in 1981 that the arched tegmina found in ""Phoraspis"" and ""Thorax"" were similar to that of ""Phlebonotus pallens"" and would suggest similar maternal care. The Indian entomologist S. Bhoopathy confirmed in 1998 that this ovoviviparous species carries some 30-40 hatchling nymphs for their first two instars in a special recess under the domed forewings on the dorsum of the mother. During"
"body section posterior to that bearing the legs and head (the prosoma or cephalothorax). Abdomen The abdomen (less formally called the belly, stomach, tummy or midriff) constitutes the part of the body between the thorax (chest) and pelvis, in humans and in other vertebrates. The region occupied by the abdomen is termed the abdominal cavity. In arthropods it is the posterior tagma of the body; it follows the thorax or cephalothorax. The abdomen stretches from the thorax at the thoracic diaphragm to the pelvis at the pelvic brim. The pelvic brim stretches from the lumbosacral joint (the intervertebral disc between"
"Abdomen The abdomen (less formally called the belly, stomach, tummy or midriff) constitutes the part of the body between the thorax (chest) and pelvis, in humans and in other vertebrates. The region occupied by the abdomen is termed the abdominal cavity. In arthropods it is the posterior tagma of the body; it follows the thorax or cephalothorax. The abdomen stretches from the thorax at the thoracic diaphragm to the pelvis at the pelvic brim. The pelvic brim stretches from the lumbosacral joint (the intervertebral disc between L5 and S1) to the pubic symphysis and is the edge of the pelvic"
"segments constituting the thorax varies from 10 to 32, and the number of legs varies accordingly. They are similar in structure to the legs of tadpole shrimp, and similarly, their size decreases from front to back. In females, the outer lobes of several middle legs are modified into long, upward-bending threadlike outgrowths, used to hold the eggs on the dorsal side of the body under the shell. However, the main functions of the thoracic legs are respiration and carrying food forward to the mouth. The gills are basically the outer lobes of all thoracic legs that are closest to the"
"Torso The torso or trunk is an anatomical term for the central part or core of many animal bodies (including humans) from which extend the neck and limbs. The torso includes: the chest, abdomen, and back. Most critical organs are housed within the torso. In the upper chest, the heart and lungs are protected by the rib cage, and the abdomen contains most of the organs responsible for digestion: the stomach, which breaks down partially digested food via gastric acid; the liver, which respectively produces bile necessary for digestion; the large and small intestines, which extract nutrients from food; the"
"Neck The neck is the part of the body, on many vertebrates, that separates the head from the torso. It contains blood vessels and nerves that supply structures in the head to the body. These in humans include part of the esophagus, the larynx, trachea, and thyroid gland, major blood vessels including the carotid arteries and jugular veins, and the top part of the spinal cord. In anatomy, the neck is also called by its Latin names, cervix or collum, although when used alone, in context, the word ""cervix"" more often refers to the uterine cervix, the neck of the"
"thorax segment. The articulating middle part of the body (or thorax) has 13 segments. The axis is convex, and less than ½× as wide as each of the so-called pleurae to its sides. Segments pointed sideways with a rounded front (a shape called falcate). The tailshield (or pygidium) is about ½× as wide as the cephalon, almost twice as wide as long, excluding the two flat, shark tooth shaped, widely spaced spines. The axis in the pygidium is 1¼× longer than wide, with almost parallel sides, almost reaching the rear margin, with 3 or 4 axial rings; 3 sets of"
"is a tagma composed of three sections, the prothorax, mesothorax and the metathorax. The anterior segment, closest to the head, is the prothorax, with the major features being the first pair of legs and the pronotum. The middle segment is the mesothorax, with the major features being the second pair of legs and the anterior wings. The third and most posterior segment, abutting the abdomen, is the metathorax, which features the third pair of legs and the posterior wings. Each segment is dilineated by an intersegmental suture. Each segment has four basic regions. The dorsal surface is called the tergum"
"contains vocal cords, the epiglottis (preventing food/liquid inhalation), and an area known as the subglottic larynx—the narrowest section of the upper part of the throat. In the larynx, the vocal cords consist of two membranes that act according to the pressure of the air. The ""Jugulum"" is a low part of the throat, located slightly above the breast. The term ""Jugulum"" is reflected both by the internal and external jugular veins, which pass through the ""Jugulum"". Throat In vertebrate anatomy, the throat is the front part of the neck, positioned in front of the vertebra. It contains the pharynx and"
"middle part of the body (or thorax) has 12 segments. The anteriormost segment gradually narrows into a sideward directed point, while further to the back the spines are directed outward and the spine is of increasing length up until the ninth, while the spine on the tenth segment is abruptly much smaller, and 11 and 12 even more so. The small tailshield (or pygidium) is about ⅓× as wide as the cephalon, narrowly transverse about 2× wider than long. Its axis is slightly wider than the pleural fields to each side, and has up to 4 axial rings and a"
"of the area outside the glabella (the 'cheeks' or genae). The occipital ring is wider than the other glabellar lobes, and carries a node on the rear edge at midline. The thorax has a wide axis of about ⅖× of the total width of the thorax, not including the spines, and consists of 9 segments. The frontal 3 are equal in size, but segments further back get smaller at an increasing rate. The thorax segments carry a node on the rear edge at midline, that diminishes towards the back. The 1st, 2nd, 4th and 5th thorax segments (counting front to"
"Cephalothorax The cephalothorax, also called prosoma in some groups, is a tagma of various arthropods, comprising the head and the thorax fused together, as distinct from the abdomen behind. (The terms ""prosoma"" and ""opisthosoma"" are equivalent to ""cephalothorax"" and ""abdomen"" in some groups.) The word ""cephalothorax"" is derived from the Greek words for head (, ') and thorax (, '). This fusion of the head and thorax is seen in chelicerates and crustaceans; in other groups, such as the Hexapoda (including insects), the head remains free of the thorax. In horseshoe crabs and many crustaceans, a hard shell called the"
"head), the thorax (literally meaning chest, but in this application referring to the mid-portion of the body), and the pygidium (meaning rump). The Hexapoda, including insects, also have three tagmata, usually termed the head, thorax, and abdomen. The bodies of many arachnids, such as spiders, have two tagmata, as do the bodies of some crustaceans: in both groups the anterior tagma may be called the cephalothorax (meaning head plus chest) or the prosoma or prosome (meaning ""fore-part of body""). The posterior tagma may be called the abdomen. In those arachnids that have two tagmata, the abdomen is also called the"
"Pharynx The pharynx (plural: pharynges) is the part of the throat behind the mouth and nasal cavity and above the esophagus and larynx, or the tubes going down to the stomach and the lungs. It is found in vertebrates and invertebrates, though its structure varies across species. In humans, the pharynx is part of the digestive system and the conducting zone of the respiratory system. (The conducting zone—which also includes the nostrils of the nose, the larynx, trachea, bronchi, and bronchioles—filters, warms and moistens air and conducts it into the lungs.) The pharynx makes up the part of the throat"
"referred to as the ""thorax"" and ""abdomen"". The back as a general area is the dorsum or dorsal area, and the lower back is the lumbus or lumbar region. The shoulder blades are the scapular area and the breastbone is the sternal region. The abdominal area is the region between the chest and the pelvis. The breast is also called the mammary region, the armpit as the axilla and axillary, and the navel as the umbilicus and umbilical. The pelvis is the lower torso, between the abdomen and the thighs. The groin, where the thigh joins the trunk, are the"
"Throat In vertebrate anatomy, the throat is the front part of the neck, positioned in front of the vertebra. It contains the pharynx and larynx. An important section of it is the epiglottis, which is a flap separating the esophagus from the trachea (windpipe) preventing food and drink being inhaled into the lungs. The throat contains various blood vessels, pharyngeal muscles, the nasopharyngeal tonsil, the tonsils, the palatine uvula, the trachea, the esophagus, and the vocal cords. Mammal throats consist of two bones, the hyoid bone and the clavicle. The ""throat"" is sometimes thought to be synonymous for the isthmus"
"and lumbar parts of the spinal cord. Some organs also receive a nerve supply from the vagus nerve. The sensation to the skin is provided by: Torso The torso or trunk is an anatomical term for the central part or core of many animal bodies (including humans) from which extend the neck and limbs. The torso includes: the chest, abdomen, and back. Most critical organs are housed within the torso. In the upper chest, the heart and lungs are protected by the rib cage, and the abdomen contains most of the organs responsible for digestion: the stomach, which breaks down"
"result, each segment bears up to six pairs of limbs. The trunk ends with a region of limbless segments. Some zoologists consider the thorax to consist of the two regions with appendages, and the abdomen the region without appendages. Others believe the region of fused segments to be part of the abdomen. For clarity, this article uses ""thorax"" to mean the two body regions with limbs. There is a carapace present, but no cephalothorax, since no thoracic segment is fused with the head. The terms ""carapace"" and ""cephalothorax"" often are confused, but should not be. The carapace of crustaceans is"
"principal ""tibial"" ""apophysis"" on the male ""pedipalp""; also just called the tibial apophysis Cephalic region: The front part of the ""cephalothorax"", separated from the thoracic region by the ""cervical groove"" Cephalothorax or prosoma: One of the two main body parts (tagmata), located towards the anterior end, composed of the head (""cephalic region"" or caput) and the thorax (thoracic region), the two regions being separated by the ""cervical groove""; covered by the ""carapace"" and bearing the eyes, legs, ""pedipalps"" and mouthparts Cervical groove: A shallow U-shaped groove, separating the ""cephalic"" and thoracic regions of the ""carapace"" Chelicera (plural chelicerae): One of"
"action of the cibarial pump, facilitated by each retraction of the tongue pushing liquid up the food canal. The insect thorax has three segments: the prothorax, mesothorax, and metathorax. The anterior segment, closest to the head, is the prothorax; its major features are the first pair of legs and the pronotum. The middle segment is the mesothorax; its major features are the second pair of legs and the anterior wings, if any. The third, the posterior, thoracic segment, abutting the abdomen, is the metathorax, which bears the third pair of legs and the posterior wings. Each segment is dilineated by"
"General Pharynx The pharynx (plural: pharynges) is the part of the throat behind the mouth and nasal cavity and above the esophagus and larynx, or the tubes going down to the stomach and the lungs. It is found in vertebrates and invertebrates, though its structure varies across species. In humans, the pharynx is part of the digestive system and the conducting zone of the respiratory system. (The conducting zone—which also includes the nostrils of the nose, the larynx, trachea, bronchi, and bronchioles—filters, warms and moistens air and conducts it into the lungs.) The pharynx makes up the part of the"
"receptors and act as sensory organs. ""N. tomentosus"" has a mandible for chewing its food. The thorax is the center of movement. It is separated into three different regions: the prothorax, the mesothorax, and the metathorax. It is heavily scleratized which provides extra support and acts as an anchor for moving parts. It is also divided into three different sections. The notum is the top most or dorsal area, the sternum is the lower or ventral side, and the pleuron is the sides where the legs are attached. The thorax is also the location of the wings. The ""N. tomentosus"""
"Thoracic cavity The thoracic cavity (or chest cavity) is the chamber of the body of vertebrates that is protected by the thoracic wall (rib cage and associated skin, muscle, and fascia). The central compartment of the thoracic cavity is the mediastinum. There are two openings of the thoracic cavity, a superior thoracic aperture known as the thoracic inlet and a lower inferior thoracic aperture known as the thoracic outlet. The thoracic cavity includes the tendons as well as the cardiovascular system which could be damaged from injury to the back, spine or the neck. Structures within the thoracic cavity include:"
"Thoracic diaphragm The thoracic diaphragm, or simply the diaphragm (), is a sheet of internal skeletal muscle in humans and other mammals that extends across the bottom of the thoracic cavity. The diaphragm separates the thoracic cavity, containing the heart and lungs, from the abdominal cavity and performs an important function in respiration: as the diaphragm contracts, the volume of the thoracic cavity increases and air is drawn into the lungs. The term ""diaphragm"" in anatomy can refer to other flat structures such as the urogenital diaphragm or pelvic diaphragm, but ""the diaphragm"" generally refers to the thoracic diaphragm. In"
"Thoracic wall The thoracic wall or chest wall is the boundary of the thoracic cavity. The bony skeletal part of the thoracic wall is the rib cage, and the rest is made up of muscle, skin, and fasciae. The chest wall has 10 layers, namely skin, superficial fascia, deep fascia, serratus anterior, layer for ribs (containing intercostal muscles), and endothoracic fascia from superficial to deep. However, the muscular layers vary according to the region of the chest wall. For example, they may include muscles like pectoralis major or latissimus dorsi. When not breathing for long and dangerous periods of time"
"thorax bears eight pairs of uniramous appendages, the first of which are used as accessory mouthparts; the next four pairs are directed forwards, and the last three pairs are directed backwards. Gills are present on the thoracic segments, and there is an open circulatory system with a heart, using haemocyanin to carry oxygen in the haemolymph to the tissues. The uptake and excretion of salts is controlled by special glands on the antennae. The abdomen is divided into two parts: the pleosome which bears swimming legs; and the urosome, which comprises a telson and three pairs of uropods which do"
"lungs may collapse, which requires immediate medical attention. Thoracic cavity The thoracic cavity (or chest cavity) is the chamber of the body of vertebrates that is protected by the thoracic wall (rib cage and associated skin, muscle, and fascia). The central compartment of the thoracic cavity is the mediastinum. There are two openings of the thoracic cavity, a superior thoracic aperture known as the thoracic inlet and a lower inferior thoracic aperture known as the thoracic outlet. The thoracic cavity includes the tendons as well as the cardiovascular system which could be damaged from injury to the back, spine or"
"Larynx The larynx (), commonly called the voice box, is an organ in the top of the neck of tetrapods involved in breathing, producing sound, and protecting the trachea against food aspiration. The larynx houses the vocal folds, and manipulates pitch and volume, which is essential for phonation. It is situated just below where the tract of the pharynx splits into the trachea and the esophagus. The word larynx (plural larynges) comes from a similar Ancient Greek word (λάρυγξ ""lárynx""). In adult humans, the larynx is found in the anterior neck at the level of the C3–C7 vertebrae. It connects"
"eyes. The mouthparts are designed for chewing and consist of a flap-like labrum, a pair of strong mandibles, a pair of maxillae, a membranous hypopharynx and a labium. The thorax consists of three segments – the hindmost two, the mesothorax and metathorax, being fused. Each segment bears a pair of legs which usually terminate in a single claw. The legs are robust and often clad in bristles, hairs or spines. Wing pads develop on the mesothorax, and in some species, hindwing pads develop on the metathorax. The abdomen consists of ten segments, some of which may be obscured by a"
"Thoracic vertebrae In vertebrates, thoracic vertebrae compose the middle segment of the vertebral column, between the cervical vertebrae and the lumbar vertebrae. In humans, there are twelve thoracic vertebrae and they are intermediate in size between the cervical and lumbar vertebrae; they increase in size going towards the lumbar vertebrae, with the lower ones being a lot larger than the upper. They are distinguished by the presence of facets on the sides of the bodies for articulation with the heads of the ribs, as well as facets on the transverse processes of all, except the eleventh and twelfth, for articulation"
"an anterior ""head"" (cephalon) and a posterior ""trunk"". The head contained the brain and carried sensory and feeding appendages. The trunk bore the appendages responsible for locomotion and respiration (gills in aquatic species). In almost all modern arthropods, the trunk is further divided into a ""thorax"" and an ""abdomen"", with the thorax bearing the main locomotory appendages. In some groups, such as arachnids, the cephalon (head) and thorax are hardly distinct externally and form a single tagma, the ""cephalothorax"" or ""prosoma"". Mites appear to have a single tagma with no obvious external signs of either segments or separate tagmata. Tagmosis"
"sacs can be clearly seen. They extend quite far caudally into the abdomen. Thoracic diaphragm The thoracic diaphragm, or simply the diaphragm (), is a sheet of internal skeletal muscle in humans and other mammals that extends across the bottom of the thoracic cavity. The diaphragm separates the thoracic cavity, containing the heart and lungs, from the abdominal cavity and performs an important function in respiration: as the diaphragm contracts, the volume of the thoracic cavity increases and air is drawn into the lungs. The term ""diaphragm"" in anatomy can refer to other flat structures such as the urogenital diaphragm"
"(or ""notum"") to distinguish it from the abdominal terga. The two lateral regions are called the pleura (singular: pleuron) and the ventral aspect is called the sternum. In turn, the notum of the prothorax is called the pronotum, the notum for the mesothorax is called the mesonotum and the notum for the metathorax is called the metanotum. Continuing with this logic, the mesopleura and metapleura, as well as the mesosternum and metasternum, are used. The abdomen is the largest tagma of the insect, which typically consists of 11–12 segments and is less strongly sclerotized than the head or thorax. Each"