知识贝壳
知识贝壳
所属栏目：英汉双解生物学
The uptake of liquid by cells.Most digested food is absorbed in the smallintestine,the inner surface of which is linedwith finger-like projections (villi): the liquidproducts of digestion are absorbed throughthe villi into the blood and lymphatic sys-tems ......（本文共 399 字 ） [阅读本文]>>