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The muscles of the stomach help it break down and digest food. Within its lumen lining, certain regions of the stomach also produce enzymes that help digest food. The enzyme pepsin, for example, breaks down proteins so that they can become amino acids. Neurologists are doctors who study the nervous system. Over time, they have identified numerous parts of the brain, including systems within the brain that function similarly to independent organs. Skeletal muscles: These are voluntary muscles, which means that a person can decide when to move them. The biceps and triceps are examples of skeletal muscles. Skeletal muscle fibers are bound together by loose areolar tissue, known as endomysium (endo- = within) which contains the usual complement of cells such as fibroblasts and macrophages, as well as small nerve and vascular branches. A person can live with just one kidney. When a person is experiencing severe kidney failure, dialysis can filter the blood until they get a kidney transplant or their kidney recovers some function. Some people need to undergo hemodialysis long term.
The temporal lobes: Located on either side of the brain, the temporal lobes play a role in numerous functions, including speech, scent recognition, and short-term memory.Proteins also serve as a major structural component of the body. Like lipids, proteins are an important constituent of the cell membrane. In addition, such extracellular materials as hair and nails are composed of protein. So also is collagen, the fibrous, elastic material that makes up much of the body’s skin, bones, tendons, and ligaments. Proteins also perform numerous functional roles in the body. Particularly important are cellular proteins called enzymes, which catalyze the chemical reactions necessary for life.
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. The extensor hallucis longus is innervated by the deep fibular nerve (L5). It receives its blood supply mainly from the anterior tibial artery, with contributions from the fibular (peroneal) artery, anterior medial malleolar artery, dorsalis pedis artery, and the plantar metatarsal artery of the first digit. Intracapsular ligaments are the ligaments that lie internal to the joint capsule. These ligaments reinforce the connection of the articulating surfaces of the joint, but allow a far wider range of motion than other ligaments. Examples include anterior and posterior cruciate ligament of the knee joint. Rotation is the movement in which a part of the body rotates around its vertical (longitudinal) axis in the transverse plane. This movement is defined relative to the midline, where internal rotation involves rotating the segment towards to the midline, while external rotation involves moving it away from the midline. Examples include lateral or medial rotation of the thigh. 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.The reproductive system works closely with other organs and organ systems. For example, the hypothalamus and pituitary gland help regulate the production and release of hormones such as estrogen and testosterone. Unipennate, in which the fascicles insert into only one side of the tendon, as in the extensor digitorum longus muscle of the leg; Non-vital organs are those that a person can survive without. However, this does not mean that conditions affecting these organs are never life threatening or dangerous. Many infections and cancers in non-vital organs are life threatening, especially without prompt treatment. Skeletal muscle fibers can be divided into two types based on how they produce and use energy: Type I and Type II.
Urethral opening: The urethra is the tube that carries urine from the bladder to the outside of the body. Its opening is located below the clitoris, directly above the vaginal opening.The main function of the fibularis longus is eversion of the foot at the subtalar joint, and plantar flexion of the foot at the ankle joint. Eversion of the foot is particularly important when walking or running on rough surfaces. In addition, it supports the lateral longitudinal and transverse arches of the foot. A wide range of conditions can affect skeletal muscles, from mild injuries to serious or even life-threatening myopathies (diseases that affect skeletal muscles). A few are:
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