2114 Cardio Lab

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created 5 years ago by Jtomchuk
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Cardio Lab Exam 1
updated 5 years ago by Jtomchuk
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1

Costal Pleura

Lines the inner aspect of the ribs and the intervening intercostal muscles

2

Parietal Pleura

Membrane that lines the inner chest walls and covers the diaphragm

3

Anterior interventricular artery

arises from the left coronary artery; if there is occlusion in the right coronary artery the anterior interventricular artery will still have normal blood flow

4

When do you hear the 2nd heart sound

When the semilunars close you hear the second heart sound, with aortic slightly before pulmonary

5

What occurs when the semilunar valves open

as ventricles CONTRACT and intraventricular pressure rises, blood is pushed up against semilunar valves, forcing them to OPEN

6

What occurs when the semilunar valves close

as ventricles RELAX and intraventricular pressure falls, blood flows back from arteries, filling the cusps of semilunar valves and forcing them to CLOSE

7

Fetal vein that passes through the the liver to the inferior vena cava- before birth; carries highly oxygenated blood from the placenta to the fetal circulation

Ductus Venous

8

Pericardium

The layer that encloses the heart, fibrous tissue that surrounds the heart and roots of the greater blood vessels

9

Chordae Tendineae

Thread-like bands of fibrous tissue which attach on one end to the edges of the tricuspid and mitral valves of the heart and on the other end to the papillary muscles, small muscles within the heart that serve to anchor the valves

10

Systole

(atrial) the CONTRACTION of the atria by which blood is propelled from them into the ventricles

(ventricle) the CONTRACTION of the cardiac ventricles by which blood is forced in to the aorta and pulmonary artery

*(also called miocardia)

11

Diastole

Time period when the heart is in a state of RELAXATION and dilation(expansion)

- diastolic pressure is specifically the minimum arterial pressure during relaxation and dilation of the ventricles of the heart

-Diastole- is the time when the ventricles fill with blood

12

Closure of the valve

2nd heart sound when the heart is relaxed the aortic and pulmonary valves are closed and then the heart contracts valves are open...

13

Papillary Muscles

Muscles located in the ventricles of the heart, they attach to the cusps of the mitral and tricuspid valves via the chrodae tendinae

(tendinae and pap muscle contract to prevent inversion or prolapse of these valves in systole (ventricular contraction)

14

Epicardium

Visceral layer of the serous pericardium; layer that protects the heart by reducing friction

15

Myocardium

Cardiac muscle layer forming the bulk of the heart; thick middle layer of the wall of the heart; composed of smooth, cardiac muscle

16

Endocardium

Inner layer of the heart wall consisting of epithelium and connective tissue as well as some specialized muscle tissue

17

At what point in the cardiac cycle is the pressure the highest in the heart

Systole (Ventricular contraction)

18

At what point in the cardiac cycle is the pressure the lowest in the heart

Diastole (Ventricular relaxation)

19

What event cause the semilunar valves to open

Ventricular pressure- pressure in the great arteries (aorta and pulmonary trunk) leaving their chambers

20
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Percardium

21
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Anterior interventricular artery

22
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Name the valves

Semilunar valve

(Aortic and pulmonary)

23
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Chordae Tendinae

24
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Ligamentum Arteriosum

25
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Name the layers of the heart-

Fibrous
Parietal
Cavity
Epicardium
Myocardium
Endocardium