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、永久纤维素壁，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.

而肺泡细胞另一边就是毛细血管壁内皮细胞，毛细血管携便是我们亲爱血液。

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

我们看到丝状纤维（比人类毛发还要细）是那些紧实干燥纤维素壁（原细胞壁）物。

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.

高血压对于血管来说是一种很严重疾病，因为它会导致血管壁内皮细胞破坏及撕裂。

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.

这些自由漂浮血小板在正常血液循环中不会凝结在一起——那太可怕了——但是当血管壁内皮细胞撕裂时，其底层胶原纤维突然暴露出来。