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Flashcards in chapter 20: the heart Deck (102)
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1

Right side of the heart carries blood

to pulmonary circuit

2

Left side of the heart carries blood to

systematic circuit

3

Pulmonary circuit

carries blood to and from gas exchange surfaces of the lungs

4

systematic circuit

transports blood to and from the rest of the body

5

location of the heart
-cavity
-near
-posterior to
-extends from
-___ of heart is to the left of the midline

-throacic
-anterior chest wall
-sternum
-T5 to T9
-2/3

6

Base of heart location

~3rd costal cartilage

7

Apex of heart
-definition
-location

-inferior pointed tip
-~5th intercostal space

8

Mediasteum
-definition
-what does it contain (5)

region between two pleural cavities
-contains heart, great vessels, thymus, esophagus and trachea

9

Tissues of the heart

pericardium

10

pericardium
-definition
-2 layers

-lining of the pericardial cavity
-1. fibrous pericardium
2. serous pericardium

11

fibrous pericardium
-location
-definition
-function

-outer most portion
-dense network of collagen fibers
-stabilizes position of heart and associated vessels

12

serous pericardium
-definition
-2 components

-inner "double" serous membrane; fluid secreting layer
-provides lubrication
-1. visceral pericardium
2. parietal pericardium

13

visceral pericardium
-location
-what does it do
-known as

-inner most layer
-covers and adheres close to outer surface of heart
-epicardium

14

Parietal pericardium
-definition
-location

-lines inner surface of pericardium
-adjacent to fibrous pericardium

15

The heart wall
-3 components

1. epicardium
2. myocardium
3. endocardium

16

epicardium
-known as
-2 components

-visceral pericardium
-1. mesothelium
2. areolar tissue (connective tissue)

17

mesothelium

fluid secreting cells

18

myocardium
--definition
-what are the cardiac muscle cells called

-cardiac muscle tissue; muscular wall of heart
-cardiomyocytes

19

endocardium
-2 components
-what type of epithelium
-function

-1. areolar tissue
2. endothelium
-simple squamous epithelium
-covers all inner surfaces of heart

20

Cardiac muscle cells
-3 general characteristics
-1 special feature

-1. striated
2. small
3. branched with a single nucleus
-intercalated discs

21

Intercalated discs
-definition
-contains
-function

-specialized membranes b/n adjacent cells
-gap junctions
-allows all cells of the heart to become excited at the same time = heart contracts as a unit

22

Auricle of right atrium

expands to fill with blood

23

left pulmonary artery

carries deoxygenated blood to lungs

24

Pathway of blood through heart
-right side (9 steps)

1. superior vena cava
2. fossa ovalis (l atrium)
3. coronary sinus (l atrium)
4. right atrioventricular valve (r AV valve, tricuspid valve) (r ventricle)
5. inferior vena cava (r ventricle)
6. papillary muscle
7. pulmonary semilunar valve
8. left and right pulmonary arteries
9. to lungs

25

pathway of blood through heart
-left side (7 steps)

1. Left and right pulmonary arteries
2. left atrium
3. left atrioventicular valve (left AV valve, bicuspid valve)
4. left ventricle
5. aortic semilunar valve
6. aorta
7. to body

26

Superior vena cava

delivers blood from upper extremities

27

coronary sinus

opening of coronary circulation

28

right atrioventricular valve
-2 other names
-function

-1. right AV valve
2. tricuspid valve
-prevents backflow

29

inferior vena cava

delivers blood from lower body

30

papillary muscle
-1 component
-definition of that component

-chordae tendinae
-cords attached to valves and anchored to papillary muscle