The Circulatory System

The Circulatory System

The circulatory system is made up of three main parts:

• The Blood

• The Blood vessels

• The Heart

Multiple Choice

How many parts is the circulatory system made up of?

• 1

• 2

• 3

• 4

The blood is made up of FOUR parts:

• Red blood cells

• White blood cells

• Platelets

• Plasma

Red Blood Cells

• Carry oxygen

• Are biconcave shaped

• Have no nucleus

• Red from haemoglobin

White Blood Cells

• help to fight infections

• Important part of immune system

Plasma

• The liquid part of the blood

• Carries all nutrients

• Carries EVERYTHING but not oxygen

Platelets

• Bind to a wound site (site of cuts)

• Helps the blood to clot

• Helps to form scabs

Multiple Choice

How many different parts is the blood made up of?

• 2

• 3

• 4

• 5

Multiple Choice

What do red blood cells carry?

• water

• oxygen

• carbon dioxide

• helium

Multiple Choice

What do white blood cells do?

• carry oxygen

• help to form scabs

• help to carry water

• help to fight infection

Multiple Choice

What do platelets do?

• help blood to clot

• help to fight infection

• carry oxygen

• carry nutrients

Multiple Choice

What is plasma?

• solid

• liquid

• gas

Multiple Choice

What does plasma carry?

• everything

• nutrients and oxygen

• everything except oxygen

Blood vessels carry blood around the body

• arteries

• veins

• capillaries

Arteries

• have VERY thick walls

• Narrow passage (LUMEN)

• Carry blood AWAY from the heart

• Arteries have to be strong because the pressure is very high.

Veins

• have thinner walls

• Larger passage (LUMEN)

• VAVLES to prevent backflow

• Carry blood TO the heart

Capillaries

• Only ONE cell thick

• Very narrow

• Where gas exchange happens

• So small only ONE red blood cell can fit through at a time!

Multiple Choice

Which blood vessel carries blood AWAY from the heart?

• arteries

• veins

• capillaries

Multiple Choice

Which blood vessel carries blood TO the heart?

• arteries

• veins

• capillaries

Multiple Choice

Which blood vessel contains valves?

• arteries

• veins

• capillaries

Multiple Choice

Which blood vessel has STRONG muscular walls?

• arteries

• veins

• capillaries

Multiple Choice

Which blood vessel is where gas exchange takes place?

• arteries

• veins

• capillaries

The Heart

• Is an organ

• Pumps blood around the body

• Made of strong muscle tissue

• The heart is inverted (left and right are backwards)

Made up of FOUR chambers

• Right atrium

• Right ventricle

• Left atrium

• Left ventricle

Atria on top and ventricles on the bottom

• Atria are the top two chambers

• Ventricles are the bottom two

• At the bottom the heart looks like it has 2 V shapes

• V for ventricles at the bottom

Right and Left

• The diagram looks like left and right are the wrong way around but they aren't!

• That's because it's looking at someone else's heart not OURS!

Multiple Choice

What is A showing?

• Right atrium

• Right ventricle

• Left atrium

• Left ventricle

Multiple Choice

What is D showing?

• Right atrium

• Right ventricle

• Left atrium

• Left ventricle

Multiple Choice

What is C showing?

• Right atrium

• Right ventricle

• Left atrium

• Left ventricle

Multiple Choice

What is B showing?

• Right atrium

• Right ventricle

• Left atrium

• Left ventricle

• There are 4 main blood vessels that connect the heart to the rest of the body

Vena Cava

Carries blood BACK to the heart from the body

V for Vena cava, V for Vein

Aorta

Carries blood AWAY from the heart to the body

A for Aorta, A for Artery

Pulmonary

Comes from the latin pulmon which means lung

Pulmonary artery

Carries deoxygenated blood AWAY from the heart to the LUNG

A for artery, A for away

Pulmonary vein

Carries oxygenated blood BACK to the heart from the lungs

Multiple Choice

Arteries carry blood ____ from the heart

• away

• to

• back

Multiple Choice

Veins carry blood __ the heart.

• away

• to

Multiple Choice

The aorta is an _______

• artery

• vein

• capillary

Multiple Choice

The vena cava is a _____

• artery

• vein

• capillary

Multiple Choice

Pulmonary means...

• to do with the heart

• to do with the brain

• to do with the blood

• to do with the lungs