Both the cells of the tunica intima and tunica media generally get the nutrients they need from the blood in the lumen.

膜和中膜的细胞，都能从管腔的血液中获取所需的营养。

Surrounding the tunica intima is the middle layer, the tunica media, made of smooth muscle cells and sheets of the protein elastin.

围绕膜的是中间层，中膜，由平滑肌细胞和蛋白弹性蛋白片组成。

A dissection is where the inner wall, or intima, gets a tear, and blood tracks into a false lumen in the vessel wall.

动脉壁或者说膜产生撕裂，血流随之进入管壁的假腔中。

The innermost tunic is called the tunica intima, which includes the endothelial cells, which create a slick surface that minimizes friction for blood moving through it.

最层者膜，有皮细胞构成；它们形成了光滑表面，使血液流经时的摩擦降到最低。

Anatomists call these layers " tunics, " and the innermost section is the tunica intima — which should be pretty easy to remember because, you know, it has like intimate contact with the lumen. It's like your circulatory underpants.

剖学家这些层束腰外衣，最里面的部分是膜——这应该很容易记住，因，你知道，它和腔有亲密的接触。就像你的循环裤。

Capillary walls are made of just a single layer of epithelial tissue, which form only the tunic intima, so they're able to deliver the oxygen and other nutrients in your blood to their cellular destinations through diffusion.

毛细血管壁仅由单层上皮组织组成，仅形成被膜膜，因此它们能够通过扩散将血液中的氧气和其他营养输送到细胞目的地。