C- Overview and Anatomy Flashcards Preview

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Flashcards in C- Overview and Anatomy Deck (33):
1

Cells Have Needs like (6)

Nutrients (glucose, amino acids)
Oxygen
Waste Removal (CO2, Lactic Acid)
Constant temperature
Constant pH
Constant isomolarity

CV system provides this

2

The function of the cardiovascular system is to maintain ______________

homeostasis

3

Three Parts to the Cardiovascular System

Heart - pump

Blood- transportation mechanism

Vasculature tubing-exchange system

4

Left side is higher pressure, serves the________

systemic circulation

5

Right side is lower pressure, serves the ___________

pulmonary circulation

6

Low pressure
single pathway through a single set of capillary beds

Pulmonary circulation:

7

Higher pressure
Mostly arranged in parallel

Systemic circulation

8

oxygenated blood usually only visits one organ system before returning to heart

parallel arrangement

9

Functional Anatomy of the Heart:
Rule of 4

4 Chambers, 4 Vessels, and 4 Valves

10

Vessels of the heart

sup. vena cava
inf. vena cave
aorta
pulm a. & v.

11

Ventricles are


main pumping chambers

12

Atria are

Smaller “priming” chambers

13

Valves of the heart

tricuspid valve
pulm valve
aortic valve
mitral valve

14

Layers of the heart wall

Epicardium
Myocardium
Endocardium

15

Pericardial Membrane is not

NOT connected to the heart, just surrounds it

16

Valves are one-way, control direction of blood flow through the heart

Pressure operated -- _______

PASSIVE

17

Atrioventricular valves

tricuspid
mitral

18

Semilunar valves

outflow valves
aortic and pulm

19

Valves are __________ control direction of blood flow through the heart

Pressure operated -- PASSIVE

one-way

20

between atria and ventricles
have chordae tendons that attach to papillary muscles in ventricles and help stabilize valves and prevent prolapse of the valves.

Atrioventricular valves

21

Between ventricles and great arteries
No chordea tendons

Semilunar valves

22

Automaticity and the heart means

heart beat is myogenic, originates within the heart itself

23

specialized myocytes
initiates the heartbeat

Sinoatrial Node

24

between atria and ventricles
slows conduction to allow atrial contraction to precede ventricular contraction

Atrioventricular (AV) node

25

between AV node and left and right bundle branches in ventricles

fibers on inner walls of ventricles = specialized cardiac myocytes cells that allow fast conduction

coordinated contraction of ventricles

His-Purkinje system

26

Coronary Circulation

R. main coronary a
left main coronary a

27

Left Main Coronary Artery

supplies left atrium & ventricle
bifurcates to Left Anterior Descending (LAD) and Circumflex arteries
LAD = “widowmaker”

28

Right Main Coronary Artery

supplies right atrium & right ventricle

29

Coronary arteries arise from root of ______

aorta

30

Anatomy of Resistance Vessels (Arterioles)

Tunica adventitia
Tunica media
Tunica intima

31

(Arterioles)
outermost layer
connective tissue (collagen & elastin)

Tunica adventitia

32

(Arterioles)
middle layer
Innervated smooth muscle cells
Controls vessel diameter

Tunica media

33

(Arterioles)
inner layer
connective tissue and vascular endothelium
Important for signaling
Site of atherosclerotic plaque formation

Tunica intima