Page 277 - New Medley 5 Semester 1

(b) Protecting the delicate internal organs

(c) Helping in the digestion of food

(d) Helping in the movement of body parts

3. A hinge joint allows bones to move

(a) In one direction only (b) Forward and backward

(c) In all directions (d) Does not allow movement

4. Muscles move the body parts by

(a) contraction (b) relaxation

(c) contraction and relaxation (d) sliding

B. Write True or False.

1. Ligaments are strong bands of tissues that hold and support joints.

2. Cartilage is present between each joint.

3. Muscles work in pairs.
4. The lower jaw is not a movable joint.

C. Fill in the blanks with the words given in the box.

eight ligament pivot bone marrow floating

1. Bones are held together at a joint by a tissue called .

2. A fatty substance called is present inside the bone.
3. Ribs not joined to the breast bone are called ribs.

4. The skull is made up of flat bones.

5. joint allows the rotating movement from side to side.

D. Answer these questions.

1. What are the functions of the skeletal system?

2. What are joints? What are their types?
3. What enables us to chew and to speak?

4. What is the difference between voluntary and involuntary muscles?

5. What are cardiac muscle fibres?
6. Draw diagrams of three types of muscle cells.

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