Lymphocytes ______________ in order the fight pathogens.

The vena cavae are the largest of what type of vessel?

Cells directly responsible for cellular immunity are the ________ cells.

Which layer/tunica of a blood vessel contains concentric sheets of smooth muscle tissue?

Multiple arteries joining in order to serve a single capillary network are called

Lymphocytes that “directly” destroy foreign cells or virus-infected “self” cells are ________ cells.

A procedure in which a length of the patient’s vein or artery is used to create a detour around an obstruction in a coronary artery is called

Damage to the papillary muscles in the left ventricle may result in 

Why is resistance higher in vessels with a smaller diameter?

The left ventricle “directly” ejects blood through the