Available Answers

1. 1.

   Name the sense organs.

   

2. 2.

   Name any two internal organs and any two external organs.

3. 3.

   Fill in the blanks.

   1. There are ______ (206/306) bones in an adult body.
   2. Bones of the skull and hip are _________ (long/flat).
   3. ______________ (Skeleton/Girdles) is a long bony structure that provides support to the body.
   4. ______________ (Shinbone/Kneecap) protects our knee joint from getting hurt or damaged.
   5. ______________ (Bone marrow/Bone space) is present inside the bones which produces red blood cells.
4. 4.

   Complete the table.

   Movement	Body parts involved	Rotates completely (360º)	Rotates partially	Bends (forward or backward)	Doesn't bend
   Bowling
   Walking
   Moving neck
   Bending to pick up something
   Wrist movement in skipping rope

    

5. 5.

   Write one word for the following:

   1. The joint that allows back and forth movement.
   2. The joint found between the bones of the vertebral column.
   3. The muscles that work on their own and whose movements cannot be controlled by us.
   4. The joint found at the ankle and wrist.
   5. The joint which helps in the movement of our head in upward, sideways and downward direction.
6. 6.

   Tick (√) the correct answer.

   1. Bones of the lower jaw and spine are _______________.
      1. flat
      2. irregular
      3. short
      4. round
   2. This joint allows movement of bones only in one direction.
      1. Hinge
      2. Ball and socket
      3. Gliding
      4. Pivot
   3. Muscles present in our heart are ______________ muscles.
      1. skeletal
      2. smooth
      3. cardiac
      4. all of these
   4. The human vertebral column is made of _______________bones.
      1. 22
      2. 24
      3. 27
      4. 33
   5. The bones of the _______________ provide protection to the brain and other vital organs such as eyes, ears, and nose.
      1. skull
      2. hip girdle
      3. ribcage
      4. limbs