The Heart

Question 1

Location and Size of Heart

Answer 1

Located in mediastinum. 2/3 of mass left of the midline

Question 2

Pericardium

Answer 2

Protective double-walled covering. Fused to diaphragm and great vessels of the heart

Question 3

What are the parts of the Pericardium

Answer 3

Fibrous Pericardium, Serous Pericardium, Pericardial Cavity

Question 4

Fibrous Pericardium

Answer 4

Outer dense C.T. layer. Protects, anchors, and prevents from overfilling

Question 5

Serous Pericardium

Answer 5

Thin, wet, double layered. Contains Visceral layer(aka, outer layer of epicardium & composed of fibroelastic tissue) & Parietal layer(inner surface of fibrous pericardium)

Question 6

Pericardial Cavity

Answer 6

between the two serous layers. Thin film of pericardial fluid

Question 7

Heart Wall is Composed of What 3 Layers?

Answer 7

Endocardium, Myocardium, Epicardium

Question 8

Endocardium

Answer 8

Squamous endothelium cells

Question 9

Myocardium

Answer 9

Cardiac muscle tethered together by C.T. fibers

Question 10

Epicardium

Answer 10

Visceral Serous Pericardium

Question 11

What are the Heart Chambers & How are they separated?

Answer 11

Separated by inatrial and interventricular septa. Right atrium, Left atrium, Right ventricle, Left ventricle

Question 12

Right Atrium

Answer 12

Entrance of SVC & IVC. Contains auricles, fossa ovalis, interatrial septum, pectinate muscles, & tricuspid valve

Question 13

Auricles

Answer 13

Increase atrial volume (flat dog ear)

Question 14

Fossa Ovalis

Answer 14

depression, closes before birth

Question 15

Interatrial Septum

Answer 15

Wall separating the right and left atria

Question 16

Pectinate Muscles

Answer 16

ridges of muscles in walls of right atrium and both auricles

Question 17

Tricuspid Valve

Answer 17

3 flaps on valve. Closes when ventricle contracts

Question 18

Left Atrium

Answer 18

entrance of pulmonary veins. Contains bicuspid valve

Question 19

Bicuspid (Mitral) Valve

Answer 19

2 flaps. Valve between left atrium & left ventricle

Question 20

Right Ventricle

Answer 20

`Forces blood into pulmonary trunk. Low in oxygen. Contains Pulmonary semilunar valve, papillary muscles, chordar tendineae, & trabeculae carneae

Question 21

Pulmonary Trunk

Answer 21

Branches into right and left pulmonary artieries

Question 22

Pulmonary Semilunar Valve

Answer 22

pressure cause the opening and closing. Blood flows through here

Question 23

Papillary Muscles

Answer 23

Contracts at same time as right ventricle

Question 24

Chordae Tendineae

Answer 24

prevents prolapse of valve. Contracts same time as ventricle does so that it stays shut

Question 25

Trabeculae Carneae

Answer 25

ridges of muscles in both ventricles

Question 26

Left Ventricle

Answer 26

forces blood through aortic semilunar valve into the aorta. high in oxygen

Question 27

Pulmonary Circulation

Answer 27

Blood pressure is 30/10

Question 28

Systemic Circulation

Answer 28

Blood pressure is 120/80