Cambridge Secondary (7-9). Stage 8. MCE Science. Student Book - Unit 2: Human Body Systems

Can you name some body systems?

Can you name some body systems? What does each body system do?

Can you name some body systems? How do they work together?

What effect does pollution have on our body systems?

Do you think having increased green spaces in our cities would help towards environmental sustainability?

Do you think having increased green spaces in our cities would help towards environmental sustainability? Would this also help some of our body systems to function better?

When you lift your arm to lift a weight, what body system are you using?

Humans need body support. Soft-bodied animals, such as jellyfish (Figure 2.3), do not have skeletons made of bones. Jellyfish have liquid and muscles that form their skeleton. Why would a skeleton of liquid not work for humans?

Look again at the diagram of the human skeleton in Figure 2.2. Why do you think the skeleton is made up of so many bones? In pairs, discuss your answers.

Study Figure 2.2. Identify the different bones in the leg. Try to feel them in your body. Share your answers with the class.

Study Figure 2.2. Identify the different bones in the arm. Try to feel them in your body. Share your answers with the class.

Study Figure 2.2. Which part of the skeleton protects the brain? Share your answers with the class.

Study Figure 2.2. Which bone in the skeleton is the longest? Share your answers with the class.

Study Figure 2.2. What are the names of the bones in the neck? Share your answers with the class.

Study Figure 2.2. What are the names of the bones in the neck? Do they feel different from the bones in your arms and legs? Share your answers with the class.

Can you identify the position of the pelvis joint in Figure 2.4?

Humans have opposable thumbs. This means we can bend and rotate the thumb at the same time. The thumb can touch fingers on the same hand (Figure 2.5). Think about your own thumbs. What other things do they allow you to do in your daily life?

Work in pairs. Look at Figure 2.6 on pages 28 and 29. Identify two places in your body where ball-and-socket joints are found. Describe the movements these joints allow. In pairs, share your findings.

Work in pairs. Look at Figure 2.6 on pages 28 and 29. Identify two places in your body where hinge joints are found. Describe the movements these joints allow. In pairs, share your findings.

So, for your arm to work, the biceps and triceps must act as a pair of antagonistic muscles. Look at Figures 2.8 and 2.9 and try this yourself.