Exam 14:The Vascular System-Part B

Fibrous connective tissue forms the _____________________ layer of an artery,and its function is to ____________________________.

In hepatic portal circulation,veins from abdominal organs unite to form the ______________ vein that empties blood into the ___________________ of the liver.

The outer layer of the wall of a vein is thin because ________________________ in veins is low.

In fetal circulation,the vessel that takes most incoming blood to the inferior vena cava is the ______________________________.

One purpose of portal circulation is to enable the liver to receive the iron of ___________________ destroyed in the spleen and ____________________ any excess.

The layer of the wall of an artery that helps prevent rupture is the ____________________.

When BP decreases,the kidneys secrete _____________________,which initiates the formation of _________________________.

In capillaries,blood pressure provides the energy for the process of ____________________.

Arteries carry blood from the __________________ to ________________________.

The respiratory pump is especially important for venous return by the veins in the _______________________________.

The large arteries are elastic,and are stretched by left ventricular ___________________,thereby lowering ______________________ BP.

If venous return decreases,the heart contracts ______________ forcefully and cardiac output ________________________.

In capillaries,oxygen and carbon dioxide are exchanged between blood and tissues by the process of _____________________.

Angiotensin II causes __________________ and stimulates the secretion of _____________________,both of which will ______________________ BP.

In pulmonary circulation,blood is pumped to the lungs by the _______________________,and returns to the _____________________ of the heart.

Velocity of blood flow is inversely related to the _________________________ of the particular part of the vascular system.

In pulmonary capillaries,______________________ diffuses from blood to air,and __________________ diffuses from air to blood.

The hormone that lowers blood pressure by increasing the excretion of sodium and water by the kidneys is __________________________.

In fetal circulation,blood flows from the fetus to the placenta through the _________________________.

The _____________________ of the brain regulates the diameter of arteries and veins.