1. Indicate ‘true’ and false’ among the following sentences:
(a) The movement and locomotion of all animals is exactly the same.
(b) The cartilages are harder than bones.
(c) The finger bones do not have joints.
(d) The fore arm has two bones.
(e) Cockroaches have an outer skeleton.
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2.If you tie a scale with your arm, are you able to bend your elbow?
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3. Name the places where two parts of the body are seen to be joined together.
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4. If there are no joints then will it be possible to move?
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5. Can bones be bent?
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6. Can we bend our body at every part?
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7.Name the various types of joint.
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8. What is cavity in bone?
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9. Give an example of fixed joint.
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10. Give an example of gliding joint.
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11. What is skeleton?
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12. What is rib cage?
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13. Name the three parts of skeleton.
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14. Name the parts of the body which help in movement.
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15. Name two animals which move without bones.
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16. Give an example of animal which can walk, climb and fly in the air.
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17. Why are fractured bones plastered?
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18. Name organs that are protected by the rib cage?
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19. Name two animals that have streamlined body.
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20. Many people suffer from a problem called arthritis. Explain its connection with movement.
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21. How is a bird’s body adapted for flying?
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Answer:
1.a)true
b)false
c)false
d)true
e)true
2.no
3.knee
4.no
5.no
6.no
7.hinge joint,ball and socket joint etc
8.a hollow area
9.head
10.Gliding joints occur between the surfaces of two flat bones that are held together by ligaments. Some of the bones in your wrists and ankles move by gliding against each other.
11.Skeletal system consists of a framework of bones and a few cartilages. Bone and cartilage are specialised connective tissues. ... Axial skeleton comprises 80 bones distributed along the main axis of the body. The skull, vertebral column, sternum and ribs constitute axial skeleton.
12.The thoracic cage (rib cage) forms the thorax (chest) portion of the body. It consists of the 12 pairs of ribs with their costal cartilages and the sternum (Figure 1). The ribs are anchored posteriorly to the 12 thoracic vertebrae (T1–T12). The thoracic cage protects the heart and lungs.
13.The three types of skeleton designs are hydrostatic skeletons, exoskeletons, and endoskeletons.
14.Our bones and muscles together form the musculoskeletal system that enables the movement of body parts and the whole body from one place to another.
15.snakes and other reptiles
16.birds
17.Fractured bones are bones that are completely or partially broken. To keep these broken bones at their right position, a plaster is used. Casts or plasters are used to help rest a bone or joint and to relieve pain that is caused by moving it. It also helps the fractured bone to grow and join properly.
18.heart and lungs
19.fishes and birds
20.Arthritis is the inflammation of one or more joints. Symptoms of arthritis include pain, joint inflammation, swelling, reduced range of motion and stiffness. People suffering from arthritis have difficulty in moving from one place to another.
21.Flying birds have: lightweight, smooth feathers – this reduces the forces of weight and drag. a beak, instead of heavy, bony jaws and teeth – this reduces the force of weight. an enlarged breastbone called a sternum for flight muscle attachment – this helps with the force of thrust.
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