Circulatory System

Front 1

What is you pulse rate> What exactly is a pulse? Where does it come from?

Back 1

The expansion of you heartbeat through your blood vessel

Front 2

Transport:

Back 2

the process by which substances move into or out of cells or are distributed by cells

Front 3

In humans, and other multi-celled organisms, the circulatory system is needed to _______ to and from all parts of the organism.

Back 3

transport materials

Front 4

the circulatory system acts as a link

Back 4

between the cells of an organism and the outside environment

Front 5

The human circulatory system consists of

Back 5

the heart, a series of blood vessels, and the blood that flows through them

Front 6

your heart is located in the _____
and about the size of your ___

Back 6

center of you chest
fist

Front 7

It is enclosed in a protective sac of tissue called the

Back 7

pericardium

Front 8

the walls of the heart are composed of a thick muscle called

Back 8

myocardium

Front 9

the powerful ___ pump blood throughout the circulatory system

Back 9

contractions of the myocardium

Front 10

dividing the right side of your heart from the left side is the

Back 10

septum

Front 11

the septum

Back 11

prevents the mixing of oxygen rich blood and oxygen poor blood

Front 12

the_____ are called atria

Back 12

upper two cahmbers of the heart

Front 13

the_____ are called ventricles

Back 13

lower two chambers of the heart

Front 14

pumonary circulation

Back 14

the right side of the heart pumps blood from the lungs

Front 15

systemic circulation

Back 15

in the lungs, carbon dioxide leaves the blood and oxygen is absorbed. The oxygen rich blood then flows into the left side of the heart and is pumped to the rest of the body

Front 16

blood that returns to the right side of the heart is ____ because cells have absorbed much of the ______

Back 16

oxygen poor
oxygen oxygen and loaded the blood with carbon dioxide.

Front 17

blood enters the heart through the____ As the heart contracts, blood flows into the _____ and then to the body or lungs.

Back 17

left and right atria
ventricles

Front 18

Flaps of connective tissue called___ are located between the ____ and also at the ____

Back 18

valves
atria
ventricles

Front 19

valves

Back 19

prevent the backflow of blood

Front 20

What is a heart murmur?

Back 20

squish-valves don't work correctly

Front 21

heartbeat: There are two networks of muscle fibers in the heart, one in the ___ and one in the ___

Back 21

atria
ventricles

Front 22

when a single fiber in either newtork is stimulated

Back 22

all the fibers are stimulated and the network contracts as a unit

Front 23

each contraction begins with the ____ located in the right atrium.

Back 23

SA node

Front 24

The SA node isknown as the ____ of the heart

Back 24

pacemaker

Front 25

When the SA node fires

Back 25

the impulse travels throughout the atria and both chambers contract

Front 26

Theimpulse will then travel to the ventricles and reach the ___ located in the right ventricle

Back 26

AV node

Front 27

The imulse will travel throughout both ventricles and cause both chambers to

Back 27

contract

Front 28

Diastole

Back 28

when the heart muscle is relaxed. This is when the chambers fill up with blood

Front 29

Systole

Back 29

when the heart muscle is contracting. This is when the heart is pumping blood.

Front 30

The heart contracts and relaxed in a rhythmic cycle. One complete sequence of pumping and filling is called the

Back 30

cardia cycle

Front 31

The pressure the heart puts on ___ can be measured by taking a blood pressure reading.

Back 31

arteries

Front 32

blood pressure:

Back 32

systolic
________
diasolic

Front 33

EKG(ECG)

Back 33

electrocardiogram, the impulses that travel through cardiac muscle during the heart cycle produce electrical currents that are conducted through body fluids to skin, where the currents can be detected by electrodes and recorded on a EKG.

Front 34

As blood moves through the circultory system, it moves through three types of blood vessels

Back 34

arteries, capillaries and veins

Front 35

arteries:

Back 35

large vessels that carry blood away from the heart to the body. Arteries have thick, muscular walls that help them withstand the intense pressure produced when the heart contracts

Front 36

most arteries carry ____
exception:____

Back 36

oxygen rich blood
pulmonary arteries

Front 37

What is an aneurism?

Back 37

burst blood vessel

Front 38

Capillaries:

Back 38

the smallest of the blood vessels. Capillaries are only one cell thick and most are so narrow that blood cells must pass through single file.

Front 39

The real work of the circulatory system_____ is done in the capillaries

Back 39

bringing nutrients and oxygen to the tissues and absorbing carbon dioxide and other wastes

Front 40

veins: once our blood passes through the capillaries, it must be _____

Back 40

returned to the heart