Now what else is formed from the mesoderm germ layer. So what else contains vessels? Well, the lymphatic system contains vessels. And so what that means is the entire lymphatic system is also made from the mesoderm. And the lymphatic system, if you recall, not only plays a role in immunity, in protecting our body from pathogenic infections, but it also plays a role in basically removing that extra fluid that is found in the interstitial space between our cells in the body. Now recall that the adrenal modula, the inner portion of that adrenal gland is formed from the exoderm.