Intestinal villus
即肠绒毛，是由上皮和固有层向肠腔突起形成。表面是单层柱状上皮，中轴是固有层结缔组织，其内有中央乳糜管，还有丰富的毛细血管，吸收细胞吸收的单糖、氨基酸由此入血，此外还有少量的平滑肌细胞，其收缩利于淋巴和血液运行。
举一反三
- adhesive intestinal obstruction
- Gelatin medium is used to identify intestinal bacteria.
- Gelatin medium is used to identify intestinal bacteria. A: 正确 B: 错误
- intestinal cells absorb aa and peptides. these cells finish splitting peptides into individual aa.
- Which of the following would not be acted upon by pancreatic juice secreted into the intestinal tract:</p></p>
内容
- 0
The thoracic duct begins at the ? right lumbar trunk|cisterna chyli|left lumbar trunk|intestinal trunk
- 1
after digestion and absorption of food fats, the resembled lipids in intestinal mucosal cells need ( ) to transport to blood, then to liver.
- 2
Which of the following is a germ cell? A: cells of the gonads B: intestinal cells C: sperm and eggs D: zygotes
- 3
The word "enteroid" means _______________. A: an intestinal hernia B: hernia of the rectum C: resembling intestine D: resembling stomach
- 4
which can increase the digestion of protein? A: pepsin B: bile C: small intestinal juice D: pancreatic juice