Module 14: The Heart Flashcards Preview

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Flashcards in Module 14: The Heart Deck (27):
1

Fibrous pericardium

Outer layer of the pericardium

2

Parietal layer of serous pericardium

Lines the inside of the fibrous pericardium

3

Visceral layer of serous pericardium

Also called the epicardium
Adheres to the surface of the heart

4

Epicardium

Outer layer (also called the visceral layer of the serous pericardium)
Consists of squamous epithelium overlying connective tissue

5

Myocardium

Middle layer that forms most of the heart wall
Consists of cardiac muscle

6

Endocardium

Inner layer
Endothelial tissue with small blood vessels and bundles of smooth muscle

7

Upper chambers

Include the right atrium and the left atrium
Separated by the interatrial septum

8

Lower chambers

Include the right ventricle and the left ventricle (the thickest of the four chambers)
Divided by the interventricular septum

9

Fibrous skeleton

Dense connective tissue that separates the upper chambers (atria) from the lower chambers (ventricles)
Acts as an insulator in that it does not allow electrical impulses to travel directly from the atria to the ventricles

10

Atrioventricular (AV) Valves

Tricuspid valve
Mitral valve

11

Tricuspid valve

Between the right atrium and the right ventricle
Three cusps (flaps)

12

Mitral valve

Between the left atrium and the left ventricle
Two cusps

13

Chordae tendineae

Connective tissue that serves as “strings” that are attached to the cusps of the AV valves
Prevent re-entry of blood into the atria during ventricular contraction

14

Papillary muscles

Extend into the ventricles and attach to the ends of the chordae tendineae

15

Semilunar valves

Pulmonary valve
Aortic valve

16

Pulmonary valve

Between the right ventricle and the pulmonary
trunk, which opens to the pulmonary arteries

17

Aortic valve

Between the left ventricle and the aorta

18

Deoxygenated blood

Enters the right atrium via the superior vena cava, inferior vena cava, and the coronary sinus

19

Superior vena cava

Returns venous blood form the upper part of the body

20

Inferior vena cava

Returns venous blood from the lower part of the body

21

Coronary sinus

Returns venous blood from the heart walls

22

Oxygenated blood

Enters the left atrium via the four pulmonary
veins

23

Left common carotid artery

Supplies oxygenated blood to the brain

24

Left subclavian artery

Supplies oxygenated blood to the arms

25

Innominate artery

Supplies oxygenated blood to the upper chest

26

Cardiac cycle

Beginning of one heartbeat to the beginning of the next heartbeat

27

Foramen ovale

Connection between the two atria in a fetal heart that allows blood to bypass the pulmonary circuit