They do build a new, permanent, cellulose wall to separate parent cells from their offspring, though.

不过，它们确实建立了一个新的、永久的纤，将亲本细胞与后代细胞分开。

On the other side of the pneumocytes are endothelial cells that line the capillary walls, which is what holds the blood.

肺泡细胞的另一边就是毛细管的内皮细胞，毛细管携带的便是我们亲爱的液。

The thread-like fibers we see — thinner than a human hair — are the remains of those dense, dried out walls of cellulose.

我们看到的丝状纤（比人类毛发还要细）是那些紧实干燥的纤（原细胞）的残留物。

It starts out as an empty protein packet sent out by the liver to gather up other cholesterols from the blood, and artery walls, and other cells.

它最初是肝脏发出的一个空蛋白质包，用来收集液中的其他胆固醇，动脉和其他细胞。

High blood pressure is a serious problem for the blood vessels because it causes wear and tear on the endothelial cells that line the inside of the blood vessels.

高压对于管来说是一种很严重的疾病，因为它会导致管内皮细胞的破坏及撕裂。

Now these free-floating platelets don't clump together during regular circulation — that would be terrible — but when the endothelial cells lining a blood vessel wall tear, the underlying collagen fibers are suddenly exposed.

这些自由漂浮的小板在正常的液循环中不会凝结在一起——那太可怕了——但是当管内皮细胞撕裂时，其底层的胶原纤突然暴露出来。