Veterinary Histology and Embryology

BLOOD VASCULAR SYSTEM

• The entire system the heart, arteries, veins, capillaries has a common lining, which consists of a single layer of cells forming the endothelium.
• In the capillaries this single layer of cells forms the entire wall.
• In the heart, arteries and veins the endothelium is invested with accessory coat of muscle and connective tissue.