Available Answers

1. 1.

   Write T for True and F for False.

   1. The framework of bones is called the skeleton.
   2. The backbone is made up of 33 small bones.
   3. The bones of the limbs are short.
   4. The humerus is also known as the thigh bones.
   5. The sternum is present at the centre of the chest region.
2. 2.

   Name the following.

   1. The place in the skeleton where two or more bones connect.
   2. The elastic, yellowish or white substance present around the bones.
   3. The type of joint that allows movement in all directions.
   4. The thin chord-like structure that connects bone with muscles.
   5. The type of muscles whose movements can be controlled by us.
3. 3.

   Choose the correct option to fill in the blank.

   1. To make our bones and joints strong, we should eat food rich in ________ (fats/calcium).
   2. We should eat food items rich in vitamin ______ (M/D) for strong bones and joints.
   3. It is important to keep our back _________ (straight/curved).
   4. A bent back causes ________ (joint/stomach) pain.
4. 4.

   Choose the correct option.

   1. The number of bones in an adult human skeleton is
      1. 210
      2. 208
      3. 206
      4. 201
   2. The bones of the wrist and ankle are
      1. long
      2. short
      3. both of these
      4. none of these
   3. Heart and lungs are protected by the
      1. ribcage
      2. skull
      3. backbone
      4. girdle
   4. Jawbone is
      1. A-shaped
      2. I-shaped
      3. U-shaped
      4. Y-shaped
   5. Voluntary muscles are present in
      1. lungs
      2. heart
      3. legs
      4. stomach
5. 5.

   Choose the correct option to fill in the blanks.

   1. All the bones present in our body forms our ___________ (digestive/skeletal) system.
   2. The bones of the limbs are ___________ (short/long).
   3. The ______________ (ribcage/skull) protects the brain.
   4. The delicate spinal cord is protected by _____________ (backbone/jawbone).
   5. The upper jaw ____________ (or/and) lower jaw have teeth.
   6. Bones are held together by ______________ (tendon/ligament).
6. 6.

   Write T for True and F for False. Correct the False statements.

   1. The bone marrow present inside the bones produces the WBCs.
   2. Hinge joint is found in the knees.
   3. The humerus bone is present in the lower limb.
   4. The backbone has 44 small bones.
   5. The cardiac muscles are found in the wall of the heart.
   6. A bent back puts burden on the backbone and joints.