Heart And Blood Vessels Flashcards
Hardest working organ in the body
Heart
Receive and collect blood
Atrium
Pump blood to other parts of the body
Ventricles
Deoxygenated blood passes through here
Superior and Inferior Vena Cava
Prevent back flow of blood
Valves
Transport deoxygenated blood from the right side of the heart to the lungs
Pulmonary circulation
Transport of highly oxygenated blood from left side of the heart to the other parts of the body
Systemic Circulation
Allow blood to flow quickly and efficiently from the heart to other parts of the body.
Blood vessel
Outer layer
Fibrous tissue
Protects & supports blood vessel
Tunica adventitia
Middle layer
Smooth muscle and elastic tissue
Tunica media
Endothelium
Outer layer
One cell thick
Only layer in capillaries
Tunica intima
Thicker, bigger, more muscular, more elastic
Receives highly pressurized blood
Transfers blood away from the heart
Artery
Blood that passes through the arm and head
Brachiocephalic artery
Passes under the clavicle
Subclavian artery
Carries blood back to the heart
Capacitance (having the capacity to hold large volumes of blood)
Veins