3B Scientific B22 Mini-Torso, 12 Part + free Anatomy App - 3B Smart Anatomy

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In insects, crustaceans, and the extinct trilobites, the thorax is one of the three main divisions of the creature's body, each of which is in turn composed of multiple segments. It is the area where the wings and legs attach in insects, or an area of multiple articulating plates in trilobites. In most insects, the thorax itself is composed of three segments; the prothorax, the mesothorax, and the metathorax. In extant insects, the prothorax never has wings, though legs are always present in adults; wings (when present) are restricted to at least the mesothorax, and typically also the metathorax, though the wings may be reduced or modified on either or both segments. In the Apocritan Hymenoptera, the first abdominal segment is fused to the metathorax, where it forms a structure known as the propodeum. Accordingly, in these insects, the functional thorax is composed of four segments, and is therefore typically called the mesosoma to distinguish it from the "thorax" of other insects.

If pregnancy does not occur, the uterine lining sheds. This is called the menstrual period. It occurs every around 28 days, though cycle length varies between females.The process of digestion starts with mastication (chewing food). Then, the saliva mixes with food and forms a bolus, a small rounded mass that can be easily swallowed. Once swallowed, the food travels down the oesophagus and into the stomach. The stomach secretes strong acids and powerful enzymes that break the food down into a paste. Core muscles are also involved in the Valsalva maneuver, where the thorax tightens while the breath is held to assist, often involuntarily, in activities such as lifting, pushing, excretion and birthing. Anatomical posture and support [ edit ] Longissimus thoracis - originates from the medial end of the iliac crest, lateral crest of the sacrum and the spinous and transverse processes of L1-L5. It inserts onto the transverse processes of T1-T12 and the angles of ribs 5-12.

Rodriguez F, Camacho A, Bordes S, Gardner B, Levin R, Tubbs R. Female ejaculation: An update on anatomy, history, and controversies. Clinical Anatomy. 2020;34(1):103-107. doi:10.1002/ca.23654 The skeleton also protects several vital organs such as the heart, lungs and the liver. Bones are attached to other bones through ligaments, a fibrous connective tissue. The leftover materials (stool) then move on to the large intestine where it transforms from liquid to solid, as water is removed. Finally, it gets pushed into the rectum, ready to be eliminated from the body. Internally, the breasts are primarily composed of fat. The amount of fat can determine breast size. However, breast size has no bearing on the amount of milk someone is able to produce. The brain is made up of three main subparts: the cerebrum, the cerebellum, and the brainstem. Within these areas, there are several key components of the brain that, together with the spinal cord, comprise the central nervous system.The organs, muscles, and other contents of the torso are supplied by nerves, which mainly originate as nerve roots from the thoracic 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 the lateral and dorsal cutaneous branches. Pittenger, John B. (1990). "Body proportions as information for age and cuteness: Animals in illustrated children's books". Perception & Psychophysics. 48 (2): 124–30. doi: 10.3758/BF03207078. PMID 2385485. S2CID 27929821. Hindbrain: The medulla, pons, and cerebellum are together, tied in the hind-brain. Interconnections of different parts of the brain’s surface that helps to accommodate neurons and connect them to the spinal column are done by the Hind brain. Urinary system is a body drainage system comprised of the group of organs that produce and excrete urine. It consists of the kidneys, ureters, urinary bladder and urethra.

The parietal lobe: Situated in the middle of the brain, the parietal lobe supports the identification of objects and spatial reasoning. It also plays a role in interpreting pain and touch signals. legs (floor to perineum) are typically three-and-a-half to four heads long; arms about three heads long; hands are as long as the face. [10] The nine major organ systems in the human body are the integumentary system, the musculoskeletal system, the respiratory system, the circulatory system, the digestive system, the excretory system, the nervous system, the endocrine system, and the reproductive system. Female body shape– Cumulative product of the human female skeletal structure and distribution of muscle and fat Spinalis is the last and most medial muscle column that makes up the erector spinae. It is divided into two parts:

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Tamura, R., Yoshida, K., & Toda, M. (2019). Current understanding of lymphatic vessels in the central nervous system. Neurosurgical Review, 43(4), 1055–1064. https://doi.org/10.1007/s10143... It is not possible to live without these organs. That said, in the case of the paired kidneys and lungs, a person can live without one of the pair. Hughes, S. M.; Gallup, G. G. Jr. (2003). "Sex differences in morphological predictors of sexual behavior: Shoulder to hip and waist to hip ratios". Evolution and Human Behavior. 24: 173-178. doi: 10.1016/S1090-5138(02)00149-6. Male SHRs (M=1.18±0.071, range 1.03–1.40) significantly (t=10.41, P<.01) exceeded female SHRs (M=1.03±0.066, range 0.90–1.22). Here and subsequently, M signifies mean±standard deviation. (These are head-on lateral widths, not circumferences.) The internal female anatomy begins at the vagina, which is the canal that leads from the vulva to the uterus. Coomaraswamy, Ananda (1934). "Aesthetic of The Śukranĩtisāra". The Transformation of Nature in Art. Cambridge, Mass.: Harvard University Press. pp.111–117. cited in Mosteller, John F. (1988). "The Study of Indian Iconometry in Historical Perspective". Journal of the American Oriental Society. 108 (1): 99–110. doi: 10.2307/603249. JSTOR 603249.