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

每个绒毛上又分布有大量微的微绒毛。

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

可以在产前通过检测胎儿DNA完，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.

些绒毛伸进基蜕膜内，像手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).

在整个肠的肠壁上有数百万微的微观的结构称为绒毛（绒毛）。

Another example can be found in your small intestine, where structures called villi fold up into little fingers.

另一个例子可以在你的肠中找到，称为绒毛的结构折叠。

Gases and nutrients move back and forth between the decidua basalis and the fetal veins, by diffusing through the tissue layer of the thin chorionic villi.

气体和营养物质通过在薄绒膜绒毛组织层之间扩散，在基蜕膜和胎儿静脉之间来回移动。

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，些膜具有称为微绒毛的微凸起以增加它们的表面积。

This happens in the small intestine's lower regions, the jejunum and ileum, which are coated in millions of tiny projections called villi.

发生在肠的下部区域，即空肠和回肠，它们被数百万个称为绒毛的微突起覆盖。

By analyzing the villi that provide contact with the mother's blood to the fetal membrane, Muneta deduced that the fetus must be living in an environment of elevated ketones from the start of pregnancy.

通过分析在母体血液和胎膜之间起着纽带作用的绒毛，Muneta 推导出，在母体受孕之，初胎儿便生活在一个酮体水平较高的环境中。