Circulatory System

Front 1

Circulatory System

Back 1

Includes heart, blood vessels and blood

Front 2

Job of the circulatory system

Back 2

move oxygen, food and other substances around the body

Front 3

Why is the heart called the double pump?

Back 3

1.The right side pumps blood to the lungs for oxygen
2.Left side pumps oxygenated blood to the rest of the body

Front 4

Arteries

Back 4

1.Carry blood away from the heart
2.Aorta is the largest artery

Front 5

Veins

Back 5

1.Carry blood back to the heart
2.Vena Cava is the largest vein

Front 6

pulmonary artery

Back 6

Only artery carrying de-oxygenated blood

Front 7

Blood flow

Back 7

R > lungs > L (Ron Loves London)
L > body > R (Lessons Bore Ron)

Front 8

What is the heart made up of?

Back 8

Cardiac Muscle

Front 9

Atria

Back 9

1.The two upper chambers of the heart
2. Each is an atrium

Front 10

Ventricle

Back 10

1. The two lower chambers of the heart

Front 11

Septum

Back 11

1. The wall down the middle of the heart

Front 12

Semi lunar valves

Back 12

1. The two valves which stop blood flowing back into the heart from the ateries

Front 13

bi-cuspid valve

Back 13

1.Valve in the left part of the heart which stops blood flowing back into the atria from the ventricles

Front 14

tri-cuspid valve

Back 14

1. Valve in the right side of the heart which stops blood flowing back into the atria from the ventricles

Front 15

left ventricle

Back 15

1. Has the thickest wall because it has to pump blood all around the body

Front 16

How the heart pumps blood

Back 16

1.The heart muscle relaxes, both sides fill up with blood from the veins
2.The atria contract and so do the veins where they join the atria. The blood is forced into the ventricles
3.The ventricles contract, the valves from the atria close, the blood is forced out of the heart into the arteries.

Front 17

Cardiac cycle

Back 17

steps 1-3 in how the heart pumps blood, repeats as a cycle and that is called the cardiac cycle

Front 18

Heart beat

Back 18

One complete cardiac cycle

Front 19

Heart rate

Back 19

number of beat per minute

Front 20

stroke volume

Back 20

volume of blood pumped from the left ventricle in each heart beat

Front 21

cardiac output

Back 21

1.Volume pumped from the left ventricle each minute
2. Stroke volume * Heart rate

Front 22

How the blood is carried around the body?

Back 22

1. The heart pumps blood at high pressure into the arteries
2.The wall's of an artery are made of muscle and elastic tissue. They stretch when blood is pumped in then contract, squirting it along
3. The artery branches into smaller tubes called arterioles
4... which branch into tiny tubes called capillaries. The thin walls allow food and oxygen to pass out to body cells, and carbon dioxide and other waste to pass in
5. Next the blood flow into larger tubes called venules. It has given up its oxygen. It is deoxygenated.
6. From the venules it flows into a vein, which carries it back to the heart

Front 23

Blood pressure decrease and blood getting slower

Back 23

Blood pressure decreases and blood gets slower as it flows from arteries to veins ( Veins are wider than arteries.)

Front 24

Artery

Back 24

1. Smooth
2. Inner lining
3.Elastic fibre
4.Muscle
5. Non-Elastic fibre

Front 25

Capillary

Back 25

Wall one cell thick

Front 26

Vein

Back 26

1. Smooth
2. Inner lining
3.Elastic fibre
4.Muscle
5. Non-Elastic fibre

Front 27

Veins have valves

Back 27

1. Blood flows quite slowly in veins. Valves stop it flowing backwards
2. Many large veins are inside leg and arm muscles. When the muscles contract, they squirt the blood towards the heart

Front 28

What is in the blood?

Back 28

1. Plasma, yellow liquid (water + plus dissolved substances
2.Red cells to carry oxygen
3. White cells to fight disease
4.Platelets to make blood clot