The brain however, does not have lymphatic vessels that it can use for waste clearance.

但大脑并没有用来清理废物的血。

To keep the lymph from sliding backwards, the lymphatic vessels have valves just like the veins.

为防止返流，和静脉一样有瓣膜。

Once the interstitial fluid is in the lymphatic vessels, it's called lymph.

一旦间液进入中，它就叫“”。

These lymphatic vessels mainly drain into a group of lymph nodes in the axilla, or the armpit.

这些主要通向腋窝结。

Lymphatic capillaries are the smallest lymphatic vessels, and they're located throughout the interstitial space.

毛细是最小的，它们广泛分布于间。

When an infection gets into the tissue, it can slip into a lymphatic capillary and move into a lymphatic vessel.

当感染侵入组织，它会进入毛细，从而进入。

The tunica externa also has nerve fibers, lymphatic vessels, and in the biggest vessels, the protein elastin.

外膜也有神经纤维、，在最大的血中也有弹性蛋白。

Cancer cells can also enter and block the thin lymphatic vessels, which causes lymph to build up in the interstitial space.

癌细胞也可以进入并阻塞细小的，使聚集到组织间隙。

That's where the lymphatic vessels, or lymphatics, come into play: they collect excess interstitial fluid and return it to the blood.

这就是发挥作用的地方了：它们收集过量的间液并把它们运回血液。

Like veins, we see that lymphatic vessels have thin walls, and the larger ones contain one-way valves.

像静脉一样，我们看到壁很薄，较大的含有单向瓣膜。

Therefore, we see that the larger lymphatic vessels contain one-way valves.

因此，我们看到较大的包含单向瓣。

The microscopic lymphatic capillaries are the smallest lymphatic vessels and collect fluid from the surrounding tissues.

显微镜下的毛细是最小的，从周围组织收集液体。

In addition, rhythmic smooth muscle contractions of the larger lymphatic vessel walls help to push the lymph along.

另外，较大的壁的节律性平滑肌收缩有助于推动。

Lymphatic capillaries are the smallest lymphatic vessels and collect fluid from the surrounding tissues.

毛细是最小的，从周围组织收集液体。

After the lymph is picked up by the lymphatic capillaries, the capillaries converge into larger lymphatic vessels.

毛细血吸收液后，毛细血会聚成较大的。

Instead, the chylomicrons go into special lymphatic vessels called lacteals, which get their name from the fact that the lymph that flows through them looks like milk.

于是乳糜微粒进入叫乳糜的特殊，它们因流经此处的形似牛奶而得名。

Just below the skin over the breast, there's a network of tiny lymphatic vessels that drain the lymph, which is a fluid containing cellular waste products and white blood cells.

在乳房皮肤下，分布着可以引流液的网络；液中有细胞代谢产物和白细胞。

Lymphatic vessels, which serve as pathways for immune cells, have recently been discovered in the brain, and they may also play a role in clearing out the brain's daily waste products.

，为免疫细胞提供路径的血，最近被发现存在于大脑中，也可能在清除大脑日常代谢物中扮演了重要的角色。

The lymphatic vessels direct lymph toward the upper chest, where they finally return to the venous blood system through one of two large ducts.

将引向上胸部，最后它们通过两条大导之一，返回静脉血液系统。

As muscles that surround the lymphatic vessels contract and relax, the blood is milked through the vessels toward the heart, kind of like squeezing the bottom of a tube of toothpaste.

随着周围的肌肉收缩和放松，血液通过血被挤向心脏，这就像挤压牙膏的底部一样。