Ch 17 - The Heart

Question 1

Right side

Answer 1

Received oxygen poor blood

Question 2

Left side

Answer 2

Receives oxygenated blood from lungs

Question 3

Right atrium

Answer 3

Received blood returning from systematic circuit

Question 4

Left atrium

Answer 4

Received blood returning from pulmonary circuit

Question 5

Right ventricle

Answer 5

Pumps blood through pulmonary circuit

Question 6

Left ventricle

Answer 6

Pumps blood through systematic circuit

Question 7

Base

Answer 7

Leans toward the right shoulder

Question 8

Apex

Answer 8

Points towards left hip

Question 8

Pericardium

Answer 8

Double-walked sad that surrounds heart

Question 9

Two layers of the pericardium

Answer 9

Fibrous and serous

Question 10

Fibrous pericardium

Answer 10

Protects and anchors heart

Question 11

Serous pericardium layers

Answer 11

Parietal and visceral

Question 12

Parietal layer

Answer 12

Lines internal surface of fibrous pericardium

Question 13

Visceral layer

Answer 13

Epicardium (external surface of heart)

Question 14

Two serous layers are separated by

Answer 14

Pericardial cavity

Question 15

Four chambers

Answer 15

Two superior atria and two inferior ventricles

Question 16

Atria

Answer 16

Receiving chambers

Question 17

Auricles

Answer 17

Appendages that increase atrial volumbe

Question 18

Superior vena cava

Answer 18

Returns blood from body regions above the diaphragm

Question 19

Inferior vena cava

Answer 19

Returns blood from body regions below the diaphragm

Question 20

Ventricles

Answer 20

The discharging chambers

Question 21

Right ventricle

Answer 21

Pumps blood into pulmonary trunk

Question 22

Left ventricle

Answer 22

Pumps blood into aorta

Question 23

Two major types of valves

Answer 23

Atrioventricular and semilunar

Question 24

Heart valves

Answer 24

Ensure unidirectional blood flow through heart

Question 25

Two atrioventricular valves

Answer 25

Tricuspid and mitral; prevent back flow into atria when ventricles contract

Question 26

Two semilunar valves

Answer 26

Pulmonary and aortic; prevent back flow from major arteries back into ventricles

Question 27

Cardiac muscle cells

Answer 27

Striated, short, branched, interconnected; contain numerous mitochondria

Question 28

Difference between cardiac and skeletal muscles

Answer 28

Some cardiac muscles are self-excitable; heart contracts as a unit; tetanic contractions can’t occur in cardiac muscles; the heart relies exclusively on aerobic respiration

Question 29

How are the heart chambers different?

Answer 29

Atria are smaller and have thinner walls;