Unit 2: Heart

Question 1

Ventricles

Answer 1

Pump blood out of the heart to the lungs and systemic arteries

Question 2

Arteries

Answer 2

Deliver blood to the capillaries which then feed the blood to the veins to be brought back to the heart

Question 3

What does blood transport?

Answer 3

Cells, proteins, nutrients and gases

Question 4

Roles of cardiovascular system (7)

Answer 4

1. Gas transport (oxygen and carbon dioxide)
2. Nutrient transport
3. Waste transport
4. Endocrine role
5. Immune role
6. Thermoregulation
7. Hemostasis

Question 5

Where is the heart located?

Answer 5

Thoracic cavity between the lungs in the pericardial cavity

Question 6

Layers of the heart

Answer 6

Epicardium, myocardium and endocardium

Question 7

Pericardium

Answer 7

Two outermost layers of heart

Fibrous is first then serous

Question 8

Visceral pericardium

Answer 8

Directly covers heart

Question 9

Endocardium

Answer 9

The lining of the heart and covers valves

Question 10

Myocardium

Answer 10

Cardiac muscle tissue, causes heart to beat, bulk of heart wall

Question 11

Epicardium

Answer 11

Covers the outside of the heart

Aka the parietal pericardium

Question 12

Define systemic circuit

Answer 12

Responsible for pumping oxygenated blood from the heart out to the rest of the body

Involves left side of heart

Question 13

Aorta

Answer 13

Pumps blood from the left ventricle to the brachiocephalic

Question 14

Vena cava

Answer 14

Brings deoxygenated blood back to the heart and drain into the right atrium

Question 15

Pulmonary circuit

Answer 15

Involves right side of heart pumping blood to the lungs

Question 16

Pulmonary arteries

Answer 16

Deliver deoxygenated blood to both the right and left lungs

Question 17

Pulmonary veins

Answer 17

Bring the oxygenated blood back to the left atrium of the heart

Question 18

Coronary circuit

Answer 18

This is how the heart supplies blood to itself

Coronary arteries branch left and right off of aorta

Question 19

Chambers

Answer 19

Four chambers of the heart

Question 20

Upper chamber of heart

Answer 20

Is called atria, receiving chambers

Question 21

Right atrium of heart

Answer 21

Receives deoxygenated blood from vena cavas and coronary sinus

Question 22

Left atrium

Answer 22

Receives oxygenated blood from the pulmonary veins

Question 23

Right ventricle

Answer 23

Receives deoxygenated blood from the right atrium and pumps into pulmonary circuit

Question 24

Left ventricle

Answer 24

Receives oxygenated blood from the left atrium and pumps into systemic cicuit

Question 25

Valaves

Answer 25

These pump blood through all four chambers

Prevent back flow of blood

Question 26

Major blood vessels

Answer 26

Function to transport blood

• pulmonary artery
• superior and inferior vena cava
• pulmonary veins
• aorta

Question 27

Coronary circulation

Answer 27

Shortest vascular route in body

Question 28

Anterior inter-ventricular artery

Answer 28

Supplies anterior portion of heart

Question 29

Circumflex artery

Answer 29

Supplies posterior portion of heart

Question 30

Marginal artery

Answer 30

Supplies lateral wall of right ventricle

Question 31

Great cardiac vein

Answer 31

Drains left side of heart

Question 32

Small cardiac vein

Answer 32

Drains right side of heart

Question 33

Middle cardiac vein

Answer 33

Drains posterior portion of heart

Question 34

SA node

Answer 34

Pacemaker, controls speed of heart beat

Question 35

AV node

Answer 35

Delays impulse to allow the atria to contact before the ventricles get the message

Question 36

Purkinje fibers

Answer 36

Spreads impulse throughout ventricles

Question 37

Atrial depolarization

Answer 37

P wave

Question 38

Ventricular depolarization

Answer 38

QRS complex

Question 39

Ventricular repolarization

Answer 39

T wave