And in turn, each villus is covered in teeny tiny little microvilli.

每个绒毛上又分布有大量微小的微绒毛。

This can also be done prenatally by testing fetal DNA obtained through either chorionic villus sampling or amniocentesis.

这可以在产前通过检测胎儿DNA完成，如绒毛膜绒毛取样或羊膜穿刺术。

These villi push into the decidua basilis, like tiny fingers reaching into a warm pool of oxygen-rich maternal blood.

这些绒毛伸进基蜕膜内，像手指伸入温暖的氧含丰富的母血池中。

In the wall of the entire small intestine are millions of tiny, microscopic projections called villi (villus).

在整个小肠的肠壁上有数百万微小的微观的结构称为绒毛（绒毛）。

Each villus is made of cells with highly folded membranes that have tiny bumps called microvilli to increase their surface area.

每个绒毛都由具有高度折叠膜的细胞组成，这些膜具有称为微绒毛的微小凸起以增加它们的表面积。