The circulatory system

Open Ended

Brainstorm what you know about the circulatory system already. Can you name any of its parts? Add your ideas to the class brainstorm.

The circulatory system

​The circulatory system is the body's transport network. Powered by the regular beating of the heart, it cycles blood throughout the body to carry substances to the places they're needed, or to where they can be removed.

Hotspot

Where on the human body do you think you would find the heart?

Delivery

The heart delivers:

Nutrients from food

Oxygen to cells

Hormones such as adrenaline to the entire body

Collects waste like carbon dioxide and urea

Spreads Heat

Multiple Choice

What kind of nutrients do we find in our blood?

• Glucose

• Glumine

• Criene

• Cellulose

Multiple Select

What systems would be linked to the digestive system remembering that

• Digestive (eating)

• Respiratory (breathing)

• Endocrine (hormones)

• Excretory (waste)

• Body system

Two main parts

​Plasma

​Red blood cells

Carry oxygen and remove carbon dioxide and waste

Contains haemoglobin

​​Red blood cells

​Fight disease and infection

White blood cells

Water portion of the blood (55%)

​​Plasma

Help blood clot

​​Platelets

Match

Match the following

Red blood cells

White blood cells

Platelets

Plasma

• Red blood cells

• White blood cells

• Platelets

• Plasma

Open Ended

When we mix sugar to water, what happens to the water?

Multiple Choice

Blood plasma is a water-based solution. Identify how it transports nutrients from food around the body.

• The nutrients dissolve in the plasma

• The nutrients are carried by haemoglobin molecules

• The nutrients are carried by the white blood cells

• The nutrients don't dissolve but flow through the blood vessels suspended in the plasma

Multiple Choice

___ _____ _____ contains haemoglobin, for transporting oxygen. 

• Plasma

• White blood cells

• Red blood cells

• Platelets

Multiple Choice

Which component of blood fights infection.

• Plasma

• White blood cells

• Red blood cells

• Platelets

Labeling

Guess the following

Drag labels to their correct position on the image

Carbon dioxide

Artery

Capilaries

Oxygen

Vein

Blood vessels

​Three types

Arteries - Carries blood away from the heart

Veins - Carries blood back to the heart

Capilaries - Delivers low-oxygen blood to veins (Smallest)

Labeling

Guess the following

Drag labels to their correct position on the image

Artery

Capilaries

Oxygen

Carbon dioxide

Vein

Most capillaries are less than a hundredth of a millimetre across and about 1 millimetre long. On the other hand, you have about 40 billion of them! If you could stitch them up end-to-end they'd wrap around Earth twice!

Open Ended

 hy do you think capillaries are so small and numerous?

Draw

Draw how you think a heart would look

The heart

The heart is a fist-sized muscle inside the rib cage.
It actually functions as two pumps working side by side and delivering blood to two main loops:

The heart

• One loop goes to the lungs. There, blood collects oxygen and delivers carbon dioxide.

The heart

• The other loop goes around the rest of the body. The blood delivers oxygen and glucose to cells for cellular respiration and collects carbon dioxide and other wastes.

The heart

• The diagram on the right shows the two loops.

• Oxygenated blood – blood rich in oxygen – is shown as bright red, and de-oxygenated blood as dark red. These are close to the real colours.

Deoxygenated = low oxygen (light)

Oxygenated = low oxygen (dark)

Multiple Choice

The right side of the heart pumps:

• Oxygenated blood to the lungs

• Oxygenated blood to the body

• De-oxygenated blood to the lungs

• De-oxygenated blood to the body

Multiple Choice

The left side of the heart pumps:

• Oxygenated blood to the lungs

• Oxygenated blood to the body

• De-oxygenated blood to the lungs

• De-oxygenated blood to the body

The heart has four chambers

Open Ended

When you exercise, your muscle cells need more oxygen and produce more carbon dioxide. You breathe more deeply and quickly, and your heart beats harder and faster. 

Using your knowledge of body systems, how these facts about cells, breathing and hearts are connected.

Multiple Choice

From the right atrium, blood is pumped to the rest of the body

• True

• False

Multiple Choice

The left ventricle pumps blood to the rest of the body through a large vein.

• True

• False

Labeling

Drag labels to their correct position on the image

right atrium

left ventricle

valves

from the lungs

right ventricle

to the body

to the lungs

Hotspot

Where do you think there would be the least amount of oxygen?

Hotspot

Where do you think there would be the most amount of oxygen?

Labeling

In the diagram below, drag the labels to match the relationship between the circulatory, digestive and respiratory systems.

Drag labels to their correct position on the image

respiratory system

circulatory system

digestive system