Exam 12: The Cardiovascular and Lymphatic Systems

These vessels take the blood back most directly to the heart.

The tempo of the heartbeat is set by a cluster of specialized cardiac muscle cells called the ________.

If the connective tissue in the ventricles,called ________,give way,blood may go backwards through the AV valves:

The left side of the heart pumps blood through the ________,which transports blood to and from body tissues.

Match each definition in the first column to the correct term in the second column. -Vessels that carry blood back to the heart from the body.

Which sequence is correct?

________ is the device that is used to measure blood pressure.

A heart ________ is an indication of disturbed blood flow due to a damaged heart valve.

Why do physicians often examine the lymph nodes of cancer patients?

Explain the mechanics of muscle contraction during a heartbeat.

Which of the following causes blood to move through veins?

The cells of the SA node are unable to maintain a stable resting membrane potential.They are particularly leaky to ions like sodium and potassium.What will this leakiness lead to?

Because the sinoatrial node sends out impulses that initiate each heartbeat,it is often referred to as the ________ of the heart.

An aneurysm is a weakening of the walls of a blood vessel.Which blood vessel would be most likely to break open if an aneurysm is present?

Match each definition in the first column to the correct term in the second column. -Structures that function to protect the throat against bacteria and foreign agents.

Match each definition in the first column to the correct term in the second column. -Site of lymphocyte production that functions to remove old red blood cells,foreign debris,and microorganisms from the blood.

Which of the following are found in many veins that help direct blood flow in one direction only: toward the heart?

The lowest blood pressure that occurs when the ventricles are relaxing is known as ________.

A child is born with a hole in his heart between the left and right ventricles.This condition must be immediately corrected with surgery because the hole ________.

A patient has a heart attack and wakes up in the hospital.He gets a visit from his doctor who says he had to shock the patient's heart because part of it had gone into fibrillation.The doctor jokes that it could have been worse if the other part of the heart had been in fibrillation and that the patient was really lucky.Which chambers of the heart in the patient were in fibrillation,the atria or the ventricles?