Available Answers

1. 1.

   Fill in the blanks.

   1. A group of cells that performs a particular function is called __________.
   2. __________ is made up of several different tissues.
   3. Blood and heart are the organs of __________ system.
   4. Respiration involves two processes __________ and __________.
   5. __________ allows us to move.
   6. __________ is the longest and strongest bone of human body.
   7. The bones are held together at the joint by tough, stretchy bands called __________.
   8. __________ joints make movement possible in one plane only.
   9. Muscles are connected to the bones by tough cords called __________.
   10. Bird's have __________ which help them to fly.
   11. The tiny hair on the surface of the earthworm are called __________.
2. 2.

   Tick (√) the correct answer:

   1. How many bones are present in a human skeleton?
      1. 306
      2. 206
      3. 200
      4. 300
   2. Which one of these is not an excretory organ?
      1. Skin
      2. Liver
      3. Pancreas
      4. Kidney
   3. Which of the following animals has its body covered with a hard shell?
      1. Snails
      2. Fish
      3. Birds
      4. None of these
   4. Which of these is protected by the skull?
      1. Arms
      2. Brain
      3. Legs
      4. All of these
   5. Which of these helps a fish to swim?
      1. Muscles
      2. Fins
      3. Stream-lined body
      4. All of these
   6. The term spinal cord is related to
      1. brain
      2. chest
      3. backbone
      4. shoulder
3. 3.

   Fill in the blanks:

   1. _____________ is the longest bone in human body.
   2. A _____________ moves with the help of a strong muscular foot.
   3. Bones are the organs of _____________ system.
   4. _____________ type of skeleton is present in earthworms.
   5. The pelvic girdles join to form a bowl-like structure called the _____________.
4. 4.

   Write 'T' for true and 'F' for false:

   1. Birds do not have backbone.
   2. Hinge joint is a movable joint.
   3. A group of tissues makes an organ.
   4. A ball and socket joint allows movement in one plane only.
   5. At the time of birth, you had 206 bones.
5. 5.

   Blood is a part of which organ system?
6. 6.

   What do you mean by a ligament?