Cardiovascular System

Question 1

Arteries

Answer 1

Vessels that carry blood away from the heart.

Question 2

Blood vessels

Answer 2

Vessel networks deliver blood to all tissues in a directed and regulated manner. closed delivery system that beings and ends at the heart.

Question 3

Capillaries

Answer 3

Tiny vessels that branch off from arteries to deliver blood to all body tissues.

Question 4

Deoxygenated

Answer 4

body → right chambers of the heart → lung

Question 5

Heart

Answer 5

A muscular pump that forces blood around the body.

Question 6

Oxygen

Answer 6

The odorless gar that is present in the air and necessary to maintain life

Question 7

Pulmonary circulation

Answer 7

between the heart and lungs, transports deoxygenated blood to the lungs to get oxygen, and then back to the heart.

Question 8

Systemic circulation

Answer 8

carries oxygenated blood away from the heart to the tissues and cells, and then back to the heart.

Question 9

Veins

Answer 9

Vessels that bring blood back to the heart.

Question 10

Size of heart

Answer 10

size of a fist and shaped like an upside-down pear

Question 11

How many chambers does the heart have

Answer 11

4

Question 12

Location of heart

Answer 12

the heart lies directly behind the sternum.

Question 13

Apex

Answer 13

The tip of the heart at the lower edge

Question 14

Endocardium

Answer 14

is the inner layer of the heart lining the heart chambers. It is a very smooth, thin layer that serves to reduce friction as the blood passes through the heart chambers.

Question 15

Myocardium

Answer 15

is the thick, muscular middle layer of the heart. Contraction of this muscle layer develops the pressure required to pump blood through the blood vessels.

Question 16

pericardium

Answer 16

epicardium is the outer layer of the heart. The heart is enclosed within a double-layered pleural sac, called the pericardium. The epicardium is the visceral pericardium, or inner layer of the sac. The outer layer of the sac is the parietal pericardium. Fluid between the two layers of the sac reduces friction as the heart beats.

Question 17

Atria

Answer 17

the receiving chambers of the heart. Blood returning to the heart via veins first collects in the atria.

Question 18

Ventricles

Answer 18

are the pumping chambers. They have a much thicker myocardium and their contraction ejects blood out of the heart and into the great arteries.

Question 19

Tricuspid valve

Answer 19

n atrioventricular valve (AV), meaning that it controls the opening between the right atrium and the right ventricle. Once the blood enters the right ventricle, it cannot go back up into the atrium again. This valve has three (tri) leaflets or cusps.

Question 20

Pulmonary valve

Answer 20

a semilunar valve, with the prefix semi- meaning half and the term lunar meaning moon, indicate that this valve looks like a half moon. Located between the right ventricle and the pulmonary artery, this valve prevents blood that has been ejected into the pulmonary artery from returning to the right ventricle as it relaxes.

Question 21

Mitral valve

Answer 21

also called the bicuspid valve, indicating that it has two cusps. Blood flows through this atrioventricular valve to the left ventricle and cannot go back up into the left atrium.

Question 22

Aortic valve

Answer 22

a semilunar valve located between the left ventricle and the aorta. Blood leaves the left ventricle through this valve and cannot return to the left ventricle.

Question 23

Oxygenated

Answer 23

Oxygenated blood flows in the pulmonary vein and in the arteries.

Question 24

Blood Pressure

Answer 24

is a measurement of the force exerted by blood against the wall of a blood vessel.

Question 25

Pulse

Answer 25

felt at the wrist or throat is the surge of blood caused by the heart contraction