villus造句
Andonthetenderleavesisalayerofvillus.Eachvillusisrichlysuppliedwithbloodwhichpassesthroughanetworkoftinytubescalledcapillaries.Intheintestinalvillusepithelialcellthevacuoledenaturates,intheendoplasmic...
Andonthetenderleavesisalayerofvillus.Eachvillusisrichlysuppliedwithbloodwhichpassesthroughanetworkoftinytubescalledcapillaries.Intheintestinalvillusepithelialcellthevacuoledenaturates,intheendoplasmic...