Cardio System Flashcards Preview

Annatomy > Cardio System > Flashcards

Flashcards in Cardio System Deck (43):
1

Purpose of cardiovascular system

To deliver oxygen and nutrients to the body and getting rid of other wastes like carbon dioxide

2

Gas exchange

CO2 is exchanged for O2
Oxygen is absorbed into capillaries lining alveoli

3

Capillaries

Smallest blood vessels connect arteries and veins

4

Arteries

Lead blood away from the heart to the cells of the body. Experience more pressure than veins.

5

Veins

Lead blood to the heart. Often flow against gravity

6

Superior and inferior vena cava

Bring deoxygenated blood to the heart and empty it into the right atrium

7

Pulmonary artery

Brings oxygenated blood to the heart

8

Atriums

The top two parts of the heart

9

Ventricles

The bottom two sections of the heart

10

Heartbeat

Caused by the valves closing

11

How our heart works

Right atrium-> right ventricle-> pulmonary arteries-> pulmonary veins-> left atrium-> left ventricle-> body tissue

12

Deoxygenated blood enters the heart through what?

Superior and inferior vena cava

13

Oxygenated blood exits the heart through what?

Aorta

14

Valves function

Allow blood to move forward and prevent back flow

15

Pulmonary veins

Oxygenated blood flows back towards the heart through the right and left pulmonary veins.

16

Pacemaker

Cardiac muscle cells can contract without any input from the brain.

17

Sinoatrial node (pacemaker)

Determines when the atria will contract

18

Heart rate regulators

Impulses from SA node Stimulates left and right atria to contract first

19

Atrioventricular nodes

Receives a signal and passes it through the ventricles

20

Normal heart beat

60-100 beats per minute

21

Electrocardiograms

Measure electrical impulses coming from the heart and creates a graph of the output

22

Reading an EKG

Each change is given a letter to correspond to a specific change in the heart

23

P wave

Aorta contract

24

QRS wave

Ventricles contract

25

T wave

Ventricles relax

26

Arrhythmia

An irregular heartbeat pattern that doesn't follow P-QRS-T pattern

27

Atrial fibrillation

Rapid/ irregular heartbeat

28

Bradycardia

Heartbeats too slow

29

Tachycardia

Heart beats too fast >100 beats per minute

30

Blood pressure

The force that blood exerts on the blood vessels

31

Systolic pressure

Measured when ventricles contract and push blood through the arteries

32

Diagnostic pressure

When ventricles relax and begin refilling

33

Normal blood pressure range

120-140/80-90

34

Atherosclerosis

A buildup of lipids, calcium, or cell debris that restrict blood flow. If happens in the coronary artery it causes a heart attack

35

Bypass

Involves transplanting a vein from another part of the body onto the heart. The blood is re- routed around the blockage.

36

Angioplasty

A narrow balloon is inserted into the blocked vessel and then it is inflated. If the vessel doesn't stay open on its own a street will be inserted to hold it open

37

Fetal circulation

In a fetus the lungs are nonfunctional and can be bypassed.

38

Foramen ovale

An opening that allows blood to move directly from the right to left atrium

39

Umbilical veins

Fetus receives all of its oxygen and nutrients from the mother (1/2 the blood enters the liver)

40

Umbilical artery

Takes wastes away and are returned to the mother

41

Cardiovascular System

Includes heart and other blood vessels that circulate throughout the body

42

Oxygenated

Left side

43

Deoxygenated

Right side