Tunica Externa
Tunica Intima
The tunica intima is the innermost layer of a blood vessel and is composed of endothelial cells. It functions in regulating blood flow and preventing blood clot formation.
the capillaries are the most common blood vessel in the human body.
Vein
veins
hepatic vein
capillaries
The Aorta would have the most because it leads from the heart to the rest of the body. The Aorta is the body's largest artery. It is the main blood vessel carrying oxygenated blood from the heart.
hepatic portal vein
Tunica Media
In the umbilical cord you have one vein and two arteries. This vein goes to the liver of foetus. This blood vessel contains most oxygen and food in case of foetus. After birth this vessel gets obliterated to form the falciform ligament.
Capillaries
arteriol