Human Circulatory and Respiratory Systems

Human Circulatory and Respiratory Systems

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Multiple Select

Which of the following is a function of circulatory system?

• transport carbon dioxide away from the body

• transport digested food to all parts of the body

• break down food into simpler substances

Multiple Select

Which of the following is part of the circulatory system?

• heart

• nose

• gullet

• blood

Multiple Choice

Your heart is the size of

• a baseball

• a ping pong ball

• your fist

How do we measure our heart rate?

We can know our heart rate by feeling our pulse. Although pulse rate (how fast our pulse is) and heart rate (how fast heart beats) are not the same, measuring our pulse rate will help know our heart rate. Watch the video to find out how.

Open Ended

Name:

Heart rate:

How do we measure our heart rate?

Jog on the spot for 3 minutes or do 15-star jump. Once you have finished, measure your heart rate over 15 seconds and record it.

Open Ended

Name:

Heart rate:

Multiple Choice

Name organ A and B?

• A: heart B: lungs

• A: head B: heart

• A: lungs B: heart

Multiple Choice

What is the correct path through the circulatory system which describes the passage of blood originating in the left leg?

• lungs $\rightarrow$ heart $\rightarrow$ leg $\rightarrow$ lungs

• leg $\rightarrow$ heart $\rightarrow$ lungs $\rightarrow$ heart

• leg $\rightarrow$ lungs $\rightarrow$ heart $\rightarrow$ lungs

Multiple Choice

What is system X?

• digestive

• circulatory

• respiratory

• muscular

Multiple Choice

Name system Y.

• circulatory

• respiratory

• digestive

• muscular

Multiple Choice

Which arrows show the flow of blood that is rich in carbon dioxide?

• W and X

• Y and Z

• W, X and Y

• X, Y and Z

Multiple Choice

Air is a mixture of many gases. Which gas constitutes the largest percentage in air??

• nitrogen

• oxygen

• carbon dioxide

• water vapour

Multiple Choice

Other than nitrogen, what are the other gases that are also found in air?

• oxygen only

• oxygen and carbon dioxide only

• oxygen, carbon dioxide, water vapour and other gases

• carbon dioxide and water vapour

Multiple Choice

When humans breathe in air, our diaphragm moves ________________ and the chest moves___________ and ____________________.

• upwards, upwards,outwards

• upwards, upwards,inwards

• downwards, upwards, inwards

• downwards, upwards, outwards

How do we measure our breathing rate?

 Try this:

Stay seated and calm. You are going to measure the number of times you breath in for 15 seconds. Multiply this number by 4 and you will get your breathing rate per min.

Open Ended

Name:

Breathing rate:

How do we measure our breathing rate?

 Try this:

Jog on the spot for 3 minutes or do 15-star jump. Once you have finished, measure your breathing rate over 15 seconds and record it.

Open Ended

Name:

Breathing rate:

Multiple Choice

Humans breathe through their nostrils. What are the functions of the tiny hairs in the nostrils?

• to moisten the air

• to help in breathing

• to produce mucus

• to trap dust and bacteria

Multiple Choice

In the lungs, there are many tiny _______________,

surrounded by many tiny _________ _____________.

• blood vessels, air sacs

• air sacs, carbon dioxide

• air sacs, blood vessels

• air sacs, water vapour

Multiple Choice

In the lungs, _________________ moves from the air sacs into the blood vessels while ____________________ moves from the blood vessels into the air sacs.

• carbon dioxide, oxygen

• oxygen, carbon dioxide

• carbon dioxide, nitrogen

Multiple Choice

Two boys were trapped in a cave for a few days. They stayed calm and waited to be rescued. Name gas E and F.

• E: carbon dioxide

  F: water vapour

• E: water vapour

  F: oxygen

• E: oxygen

  F: water vapour

Multiple Choice

The graph below shows Lutfi’s pulse rate taken when he was involved in three different activities.

Which line A, B or C shows Lutfi’s pulse rate when he was running at East Coast Park?

• A

• B

• C

Multiple Choice

Study the three set-ups X, Y or Z . At the start, the colour of substance P in each set-up was red. If the amount of carbon dioxide increases, substance P will change from red to yellow.

What is the colour of substance P in each set-up after 3 hours?

• X: red Y: yellow Z: yellow

• X: yellow Y: yellow Z: red

• X: yellow Y: red Z: red

Open Ended

Which path, L or M, has more oxygen in the bloodstream? Explain your answer.

L. The heart pumps blood rich in oxygen to all parts of body. Oxygen will be used by the body to produce energy. Thus, Path M has less oxygen in the blood.