Lesson 4.1 Heart Structure

Question 1

Aorta

Answer 1

The large arterial trunk that carries blood from the heart to be distributed by branch arteries through the body.

Question 2

Aortic Valve

Answer 2

The semilunar valve separating the aorta from the left ventricle that prevents blood from flowing back into the left ventricle.

Question 3

Artery

Answer 3

Any of the tubular branching muscular and elastic-walled vessels that carry blood from the heart through the body.

Question 4

Atrium

Answer 4

An anatomical cavity or passage; especially a chamber of the heart that receives blood from the veins and forces it into a ventricle or ventricles.

Question 5

Cardiovascular System

Answer 5

The transport system of the body responsible for carrying oxygen and nutrients to the body and carrying away carbon dioxide and other wastes; composed of the heart, blood vessels, and blood.

Question 6

Cell

Answer 6

The smallest structural unit of living matter capable of functioning independently.

Question 7

Inferior Vena Cava

Answer 7

A vein that is the largest vein in the human body and returns blood to the right atrium of the heart from bodily parts below the diaphragm.

Question 8

Mitral Valve

Answer 8

A valve in the heart that guards the opening between the left atrium and the left ventricle; prevents the blood in the ventricle from returning to the atrium. Alternative name is bicuspid valve.

Question 9

Pulmonary Circulation

Answer 9

The passage of venous blood from the right atrium of the heart through the right ventricle and pulmonary arteries to the lungs where it is oxygenated and its return via the pulmonary veins to enter the left atrium and participate in systemic circulation.

Question 10

Superior Vena Cava

Answer 10

A vein that is the second largest vein in the human body and returns blood to the right atrium of the heart from the upper half of the body.

Question 11

Systemic Circulation

Answer 11

The branch of the circulatory system that supplies all body organs and then returns oxygen-poor blood to the right atrium via the veins.

Question 12

Tissue

Answer 12

An integrated group of cells with a common function, structure, or both.

Question 13

Tricuspid Valve

Answer 13

A valve that is situated at the opening of the right atrium of the heart into the right ventricle and that resembles the mitral valve in structure but consists of three triangular membranous flaps.

Question 14

Valve

Answer 14

A body structure that temporarily closes a passage or orifice, or permits movement of fluid in only one direction.

Question 15

Vein

Answer 15

A vessel that returns blood to the heart.