contracted muscles
51digestive system disease — Introduction any of the diseases that affect the human digestive tract. Such disorders may affect the esophagus, stomach, small intestine, large intestine (colon), pancreas, liver, or biliary tract. A prevalent disorder of the digestive… …
52eye disease — Introduction any of the diseases or disorders that affect the human eye (eye, human). This article briefly describes the more common diseases of the eye and its associated structures, the methods used in examination and diagnosis, and the… …
53Columella (gastropod) — An X ray image of a shell of a marine triton snail, Charonia, showing the slightly sinuous line of the central columella, reaching from the top of the image (the apex of the shell) to the bottom (the siphonal canal) The columella (meaning little… …
54Cnidaria — Temporal range: 580–0 Ma …
55Orgasm — For other uses, see Orgasm (disambiguation). Frenzy of Exultations (1894), by Wł …
56Breathing — Breath redirects here. For other uses, see Breath (disambiguation). For other uses, see Breathing (disambiguation). The human respiratory system Breathing is the process that moves air in and out of the lungs. Aerobic organisms require oxygen to… …
57En pointe — Dancing on pointe, or en pointe (pronounced IPA|/ɑ̃ pwɛ̃t/, often anglicised as IPA|/ɑn pwɛ̃t/ or IPA|/ɑn pɔɪnt/), is the act of standing on the tips of the toes while performing steps from ballet. Also known as pointe work, it is performed using …
58Evolution of mammals — Restoration of Thrinaxodon, a member of the cynodont group, which includes the ancestors of mammals Further information: Evolutionary history of life The evolution of mammals within the synapsid lineage (sometimes called mammal like reptiles )… …
59Columella (mollusk) — The columella (meaning little column), is an anatomical feature of a coiled snail shell or gastropod shell. It is often only clearly visible as a structure when the shell is broken, or sliced in half vertically. If you visualize a coiled snail… …
60dance — dancingly, adv. /dans, dahns/, v., danced, dancing, n. v.i. 1. to move one s feet or body, or both, rhythmically in a pattern of steps, esp. to the accompaniment of music. 2. to leap, skip, etc., as from excitement or emotion; move nimbly or… …
