Blood Vessels. Blood Vessel are tubes which carry blood. Veins are blood vessels which carry blood from the body back to the heart. Arteries are blood vessels which carry blood from the heart to the body. There are also microscopic blood vessels which connect arteries and veins together called capillaries.There are a few main blood vessels which connect to different chambers of the heart. The aorta is the largest artery in our body.lood Vessels. Blood Vessel are tubes which carry blood. Veins are blood vessels which carry blood from the body back to the heart. Arteries are blood vessels which carry blood from the heart to the body. There are also microscopic blood vessels which connect arteries and veins together called capillaries.
Skin pigmentation. Melanin, whose primary function is in pigmentation, has many more important functions to perform in the human body. Protection from UV radiation. Melanin functions as a sunscreen and as a broad spectrum sun radiation absorbent. The absorbed energy causes redox reactions, and both eumelanin and pheomelanin form free radical species. Eumelanin, being more photostable scavenges the originated oxidative species and neutralizes them.
Melanin is found in several areas of the human body including: 1  Skin where it provides skin color. 2  Hair. 3  Pupils or irises of the eyes. 4  Stria vascularis of the inner ear. 5  Areas of the brain, the substantia nigra and locus coeruleus. 6  The medulla and zona reticularis of the adrenal gland.