circulatory

Question 1

COMPONENTS of circulatory system

Answer 1

1. Cardiovascular systems
2. Lymph Vascular systems

Question 2

Components of Cardiovascular system

Answer 2

Heart & Blood Vessels

Question 3

Brings blood from the heart to the lungs and then back to the heart

Answer 3

Pulmonary Circulation

Question 4

Brings blood from the heart to all the other tissues and organs of the body, and then back to the heart

Answer 4

Systemic Circulation

Question 5

CONNECTIVE TISSUE COVERING THE HEART

Answer 5

Pericardium

Question 6

Dense irregular CT

Answer 6

Fibrous Pericardium

Question 7

loose CT covered by mesothelium

Answer 7

Parietal pericardium

Question 8

Reduces friction between the parietal and visceral pericardium during contraction

Answer 8

Pericardial Fluid

Question 9

15-50mL in adults

Answer 9

Pericardial Fluid

Question 10

modified cardiac muscle fibers

Non-contractile
• Larger, pale staining
• Contains more glycogen than surrounding cardiomyocytes
• Also connects via gap junctions, desmosomes, fascia adherens
• Purkinje fibers→ depolarize -90 mV
(Ca+, Na+, K+) to initiate contraction. Because it contains lots of mitochondria.

Answer 10

Purkinje Fibers

Question 11

PACEMAKER’; Purkinje fibers here are smaller than elsewhere in the heart

Location: boundary of right atrium & SVC

Answer 11

Sinoatrial Node

Question 12

Ramifies into numerous PURKINJE FIBERS

Answer 12

Bundle Branches

Question 13

● Dense irregular connective tissue
● Attachment site of cardiac muscles and valves
● Attachment site for epimysium, perimysium, endomysium of Cardiac muscle (Acts the same as tendons)

Answer 13

Cardiac Skeleton

Question 14

Cardiac Valves
Covered by
Originate from

Answer 14

Dense Irregular Connective Tissue
Endothelium
Cardiac Skeleton

Question 15

Left Atrioventricular valve

Answer 15

Bicuspid Valve

Question 16

Right Atrioventricular valve

Answer 16

Tricispid Valve

Question 17

Pulmonic and Aortic valves

Answer 17

Semilunar Valves

Question 18

Thinnest histologic layer of the heart

Answer 18

Endocardium

Question 19

4 HISTOLOGIC LAYERS OF ENDOCARDIUM

Answer 19

• Endothelium
• Subendothelium
• Dense Irregular Connective Tissue Layer
• Subendocardium

Question 20

Endothelium (Epithelial cells)

Answer 20

Simple Squamous Epithelium

Question 21

lines all the wall of heart and blood vessels.

Answer 21

Endothelium

Question 22

loose connective tissue (endocardium)

Answer 22

Subendothelium

Question 23

thickest portion of the endocardium; collagen fibers, smooth muscles, fibroblasts, elastic fibers

Answer 23

DENSE IRREGULAR CONNECTIVE
TISSUE LAYER

Question 24

loose connective tissue; contains the blood vessels & nerves, Purkinje fibers

Answer 24

Subendocardium

Question 25

Thickest histologic layer of the heart
Thickest in the left ventricle, thinnest in the atria.

Answer 25

Myocardium

Question 26

Component of Myocardium

Answer 26

Cardiac Muscle fibers

Question 27

Synonymous with the visceral pericardium

Outermost histologic layer of the heart

Answer 27

Epicardium

Question 28

Basic layers of the blood vessels

Answer 28

1. Tunica Intima
2. Tunica Media
3. Tunica Adventitia

Question 29

Can only be found on Medium sized muscular arteries

Answer 29

Internal Elastic Lamina