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Flashcards in Chapter 01 Deck (27)
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Atrium

Upper chamber of the heart

1

Ventricle

Lower chamber of the heart

2

Coronary sulcus

The atrioventricular groove that surrounds the outside of the heart and divides the atria from the ventricles

3

Mediastinum

The central section of the thorax (chest cavity)

4

Pericardium

Closed, two layer sac that surrounds the heart

5

Pericarditis

An inflammation of the serous pericardium

6

Epicardium

The smooth outer surface of the heart

7

Myocardium

The thick middle layer of the heart composed primarily of cardiac muscle cells and responsible for the hearts ability to contract

8

Endocardium

The innermost layer of the heart; composed of thin connective tissue

9

Tricuspid valve

Named for its three cusps; located between the right atrium and the right ventricle

10

Chordae tendineae

Fine chords of dense connective tissue that attach to papillary muscles in the wall of the ventricles

11

Mitral (bicuspid) valve

Similar in structure to the tricuspid valve but with only two cusps and is located between the left atrium and the left ventricle

12

Semilunar valves

Serve to prevent the back flow of blood into the ventricles, each valve containing three semilunar (or moon shaped) cusps

13

Pulmonic valve

The semilunar valve located between the right ventricle and the pulmonary artery

14

Aortic valve

The semilunar valve located between left ventricle and the trunk of the aorta

16

Arteries

Thick walled and muscular blood vessels that function under high pressure to convey blood from the heart out to the rest of the body

17

coronary arteries

the two main arteries that arise from the trunk of the aorta and function to carry oxygenated blood throughout the myocardium

18

coronary circulation

the process by which oxygenated blood is distributed throughout the heart muscle

19

coronary sinus

(also referred to as the "great cardiac vein") a short trunk that that serve to receive deoxygenated blood from the veins of the myocardium

20

veins

blood vessels that carry blood back to the heart, operate under low pressure, and are relatively thin walled

21

superior vena cava

drains blood from the head and neck

22

inferior vena cava

collects blood from the rest of the body

23

capillaries

tiny blood vessels that allow for the exchange of oxygen, nutrients, and waste products between the blood and body tissues; "connectors" between the arteries and veins

24

circulation

movement through a course (the body) that leads back to the initial point (the heart)

25

pulmonary circulation

when blood leaves the heart through the right ventricle and travels into the pulmonary artery to the lungs and back through the pulmonary veins to the left atrium

26

tissues perfusion

refers to gas exchange within the alveolar capillary membranes in the lungs

27

systemic circulation

the circulation of blood as it leaves the left ventricle and travels through the arteries, capillaries, and veins of the entire body system and back tot he primary receptacle of the heart (the right atrium)