Which types of blood vessels can regenerate in humans/mammals? From what I understand, arteries and arterioles can be created later in life, while this is not necessarily the case with veins. However I don't understand why damaged blood vessels in an eye recover, while this is not the case for other body parts. Also, I don't understand how angiogenic agents work.
The types of blood vessels I've been thinking about include:
Also, does the capability vary in different organs (e.g. blood vessels in a hand vs blood vessels in an eye)?