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Small intestine

Noun 1. The part of the gastrointestinal tract following the stomach and followed by the large intestine, and is where much of the digestion and absorption of food takes place. ( 2. The upper part of the intestine, between the stomach and the large intestine, divided into the duodenum, the jejunum and the ileum. ( 3. The small intestine is composed of three sections: duodenum, jejunum and ileum. All are involved in the absorption of nutrients. The total length of the small intestine is approximately 22 feet. ( 4. The longest part of the alimentary canal where digestion is completed. ( 5. It is a tube-like structure that can be over 6 metres long in a grown adult that forms part of the digestive system. The small intestine is the site where most food is absorbed in an organism, where digestive enzymes are secreted into it to further break down food. ( 6. The part of the intestine that runs between the stomach and the large intestine; the duodenum, jejunum, and ileum collectively. (Google Dictionary) Syn: Small...

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Smooth muscle

Noun, smooth muscles 1. An involuntary non-striated muscle. It is divided into two sub-groups; the single-unit (unitary) and multiunit smooth muscle. They are found within the walls of blood vessels (such smooth muscle specifically being termed vascular smooth muscle) such as in the tunica media layer of large (aorta) and small arteries, arterioles and veins. Smooth muscle is also found in lymphatic vessels, the urinary bladder, uterus (termed uterine smooth muscle), male and female reproductive tracts, gastrointestinal tract, respiratory tract, arrector pili of skin, the ciliary muscle, and iris of the eye. The structure and function is basically the same in smooth muscle cells in different organs, but the inducing stimuli differ substantially, in order to perform individual effects in the body at individual times. In addition, the glomeruli of the kidneys contain smooth muscle-like cells called mesangial cells. ( 2. Involuntary muscle which is found within the intestines, throat, uterus, and blood vessel walls. ( 3. Muscle tissue in which the contractile fibrils are not highly ordered, occurring in the gut and other internal organs and not under voluntary control. (Google Dictionary) 4. A muscle that contracts without conscious control and found in walls of internal organs such as stomach and intestine and bladder and blood vessels (excluding the heart). ( 5. Muscle tissue that does not appear striated under the microscope; has the form of thin layers...

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