Fill in each blank with the correct word from the lesson.

1. Muscles never push — they _______.
2. A newborn baby has around three hundred _______, but many of these fuse together as you grow, so adults have two hundred and six.
3. Third, they enable movement together with _______.
4. _______ and vitamin D keep bones strong, and exercise keeps muscles powerful and healthy.
5. Bones also produce blood _______s inside the bone marrow — the soft tissue inside them.

Choose the best option for each question.

1. How many bones does an adult human have?
   a) 300b) 206c) 150d) 500
2. What do muscles do — push or pull?
   a) Both push and pullb) Only pushc) Only pulld) Neither
3. Which organ does the ribcage protect?
   a) The brainb) The stomachc) The kidneysd) The heart and lungs

Write T for True or F for False in the brackets.

1. 206 is one of the key concepts in the lesson on Bones and Muscles.
2. 300 is the main topic of this lesson.
3. Muscles never push — they only pull.
4. Muscles never push — they Both push and pull.

1. In your own words, explain what Bones and Muscles means.
2. List two things you learned from this lesson on Bones and Muscles.