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小肠绒毛(组成、细微结构、功能)

名词解释题
2022-04-24 14:46
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正确答案
绒毛是由上皮和固有层向肠腔突起而成。表面为上皮,由吸收细胞、杯状细胞等组成,吸收细胞游离面有纹状缘,表面积大,可吸收营养物质。绒毛中轴内有毛细血管、中央乳糜管(吸收营养物质)和纵行平滑肌纤维(利于血液和淋巴的运行)。

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标签: 大学试题 理学
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