THE CARDIOVASCULAR SYSTEMTHE CARDIOVASCULAR SYSTEM

What does Oxygenated and Deoxygenated mean?

• Oxygenated blood:

• Deoxygenated blood:

The heart as a double pump

The right side of the heart transports de-oxygenated blood to the……………..and deals with blood returning from the……………..

The left side of the heart transports oxygenated blood to the……………..

and deals with the blood returning from the……………..

RIGHT LEFT

How it Works

HEART

LUNGS

BODY

Oxygenated and Deoxygenated blood

• When the blood leaves the lungs it is

………………….

• The blood then visits the muscles in the body and gives the oxygen to them so they can work.

• The blood is now ………………….

• The …………………. blood then visits the lungs when it picks up oxygen and becomes ………………….

The structure of the heart

Structure of the heart CHAMBERS

Right Atrium

Left Ventricle

Right Ventricle

Left Atrium

1

3

4

2

Structure of the heartVALVES

Bisucpid Valve

Semi-Lunar Valve

Tricuspid Valve

Semi-Lunar Valve

1

4

32

Structure of the heartBLOOD VESSELS

Pulmonary vein

Vena Cava

Pulmonary Artery

Aorta

1

4

3

2

Structure of the heartBLOOD VESSELS

Septum

Functions of the chambers

• The right atrium takes deoxygenated blood from the vena cava and stores it before sending it through the tricuspid valve.

• The right ventricle receives de-oxygenated blood through the tricuspid valve before pumping it up the pulmonary artery to the lungs.

Functions of the chambers

• The left atrium

• The left ventricle

Functions of the valves• The tricuspid valve stops blood flowing

back into the right atrium.

• The bicuspid valve

• The semi lunar valves stop blood flowing back into the left and right ………………

Functions of the blood vessels

• The vena cava transports de-oxygenated blood from the body to the heart. Here is gives the oxygen to the working muscles.

• The pulmonary artery

Functions of the blood vessels

• The pulmonary vein transports oxygenated blood from the lungs to the heart.

• The aorta

Blood Vessels

• Arteries

• Veins

• Capillaries

Thermoregulation:Vasodilation of vessels

• This is when you body temperature rises.

• It is when the blood vessels expand, meaning the blood flows nearer to the surface of the skin.

• It is a way of cooling you down.

• It makes your skin become red after a heart raising activity.

Thermoregulation: Vasoconstriction of vessels

• This is when your body temperature decreases, which makes your blood vessels constrict.

• This means less blood flows near the surface of your skin so less heat is lost.

• It happens when you are

• It happens when you are cold.