| 释义 |
rectum
rec·tum R0093600 (rĕk′təm)n. pl. rec·tums or rec·ta (-tə) The terminal portion of the large intestine, extending from the sigmoid colon to the anal canal.
[Middle English, from Latin (intestīnum) rēctum, straight (intestine), neuter of rēctus; see reg- in Indo-European roots.]rectum (ˈrɛktəm) n, pl -tums or -ta (-tə) (Anatomy) the lower part of the alimentary canal, between the sigmoid flexure of the colon and the anus[C16: shortened from New Latin rectum intestinum the straight intestine]rec•tum (ˈrɛk təm)
n., pl. -tums, -ta (-tə). the terminal section of the large intestine, ending in the anus. [1535–45; < New Latin rēctum (intestīnum) the straight (intestine)] rec·tum (rĕk′təm) The lower end of the digestive tract, extending from the colon to the anus.rectumThe last part of the colon, where feces collect before leaving the body.Thesaurus| Noun | 1. |  rectum - the terminal section of the alimentary canal; from the sigmoid flexure to the anusbody part - any part of an organism such as an organ or extremityarteria rectalis, rectal artery - one of the arteries supplying the rectal arealarge intestine - beginning with the cecum and ending with the rectum; includes the cecum and the colon and the rectum; extracts moisture from food residues which are later excreted as fecesanus - the excretory opening at the end of the alimentary canal |
rectum nounRelated words
adjective rectalTranslationsrectum (ˈrektəm) noun the lower part of the alimentary canal, through which waste substances pass from the intestines. 直腸 直肠
rectum
rectum: see intestineintestine,
muscular hoselike portion of the gastrointestinal tract extending from the lower end of the stomach (pylorus) to the anal opening. In humans this fairly narrow (about 1 in./2.
..... Click the link for more information. .rectum[′rek·təm] (anatomy) The portion of the large intestine between the sigmoid flexure and the anus. rectum the lower part of the alimentary canal, between the sigmoid flexure of the colon and the anus Rectum
rectum [rek´tum] the distal portion of the large intestine, beginning anterior to the third sacral vertebra as a continuation of the sigmoid and ending at the anal canal. The feces, the solid waste products of digestion, are formed in the large intestine and are gradually pushed down into the rectum by the muscular action of the intestine. Distention of the rectum by the accumulating feces sets up nerve impulses that indicate to the brain the need to empty the bowels. The rectum is 15 to 20 cm (6 to 8 inches) long, with the anal canal making up the last segment. The anus is kept closed (except during the evacuation process) by muscular rings called the sphincters" >anal sphincters.
In a rectal examination, the examiner palpates the rectum by inserting a gloved and lubricated finger into the rectum. The examination helps in determining whether there are masses in the rectum or pelvic region, and in determining the size and texture of the prostate in men. More extensive examination of the interior surface of the rectum may be done by proctoscopy.rec·tum, pl. rec·tums, rec·ta (rek'tŭm; -tŭmz, rek'tă), [TA] Avoid the colloquial and jargonistic use of this word as a synonym of anus.The terminal portion of the digestive tube, extending from the rectosigmoid junction to the anal canal (perineal flexure). [L. rectus, straight, pp. of rego, to make straight] rectum (rĕk′təm)n. pl. rec·tums or rec·ta (-tə) The terminal portion of the large intestine, extending from the sigmoid colon to the anal canal.rec·tum, pl. rectums, recta (rek'tŭm, -tŭmz, -tă) [TA] The terminal portion of the digestive tube, extending from the rectosigmoid junction to the anal canal. [L. rectus, straight, pp. of rego, to make straight]rectum (rĕk′tŭm) [L., straight]  RECTUM: Rectum seen during colonoscopyThe lower part of the large intestine, about 5 in (12.7 cm) long, between the sigmoid colon and the anal canal. Its smooth muscle layer is the effector for the defecation reflex, the reflex centers for which are in the second, third, and fourth sacral segments of the spinal cord. See: illustration; rectum The 12.5 cm long, very distensible terminal segment of the large intestine, situated immediately above the anal canal. In spite of its name (rectus is Latin for straight), the rectum is curved and follows the hollow of the SACRUM. Its lining is smooth and the whole of the inside is accessible to the examining finger (see RECTAL EXAMINATION). Movement of bowel contents into the rectum causes the desire to defaecate.rectum the terminal part of the intestine of an animal which opens into the ANUS or CLOACA.RectumThe lower section of the large intestine, a digestive system organ. After food has passed through the stomach and intestines and been digested, the leftover material, in the form of feces, enters the rectum, where it stays until defecation.Mentioned in: Antibiotic-Associated Colitis, Antihemorrhoid Drugs, Enemas, Enterobiasis, Fecal Incontinence, Hemorrhoids, Hypothermia, Proctitis, Rectal Examination, Rectal Polyps, Rectal ProlapseAcronymsSeePROCTO-rectum
Related to rectum: prostate, large intestine, hemorrhoids, appendix, small intestineWords related to rectumnoun the terminal section of the alimentary canalRelated Words- body part
- arteria rectalis
- rectal artery
- large intestine
- anus
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