How do arteries differ form veins?

What direct effect do histamines and leukotrienes have on capillaries?

Is there similar pattern between the carotid and iliac arteries?

Which forces affect the exchange of substances between blood and tissue fluid?

Are the arteries or theveins constituted of moremuscle tissue? How differentare the walls of these twotypes of blood vessels?

Why is the pulmonary vein called a vein if it carries oxygenated blood?

Why does blood pressure decrease as blood flows through the cardiovascular system?

What’s the major blood vessel that takes blood back to the heart? What’s the major blood vessel that takes blood to the tissues?

Which blood vessel brings oxygen poor blood to the heart from the rest of the body?         Which blood vessel takes blood from the heart and sends it to the lungs?         Which blood vessel takes oxygen-rich blood from the lungs and brings it back to the heart? .       Which blood vessel sends oxygen-rich blood from the heart to the rest of the body?

What are the functions of node of Ranvier.