Available Answers

1. 1.

   Tick (√) the correct options:

   1. The deoxygeneted blood collected from the body organs enters _____________.
      1. right ventricle
      2. right atrium
      3. left atrium
      4. left ventricle
   2. When we do physical activity, our heartbeat becomes _____________.
      1. normal
      2. slower
      3. faster
      4. no effect
2. 2.

   Tick (√) the correct options:

   1. The process by which a plant loses water through the stomata is called _______________.
      1. excretion
      2. respiration
      3. transpiration
      4. sweating
   2. Blood does not clot in a person suffering from _______________.
      1. anaemia
      2. leukemia
      3. blood cancer
      4. haemophilia
   3. The normal human heart beats at the rate of _______________ times/min.
      1. 32 to 40
      2. 42 to 50
      3. 52 to 60
      4. 72 to 80
   4. Blood is carried towards the heart by _______________.
      1. arteries
      2. veins
      3. capillaries
      4. muscles
   5. Veins allow blood to flow in one direction only due to the presence of _______________.
      1. force
      2. thick wall
      3. valves
      4. septum
   6. The deoxygenated blood is pumped into lungs from _______________.
      1. right ventricle
      2. right atrium
      3. left atrium
      4. left ventricle
   7. The blood vessels that carry blood from heart to various parts of the body are called _______________.
      1. arteries
      2. capillaries
      3. veins
      4. septum
   8. Urine is formed in _______________.
      1. urinary bladder
      2. ureters
      3. kidneys
      4. urethra
   9. Which of the following is not removed during sweating?
      1. salts
      2. urea
      3. water
      4. uric acid
   10. Which substance does the blood carry from the small intestine to all the cells of the body?
       1. oxygen
       2. hormones
       3. digested food
       4. carbon dioxide
3. 3.

   Fill in the blanks:

   1. Blood clot is formed due to the presence of _______________ in blood.
   2. The size of our heart is roughly equal to our _______________.
   3. _______________ are the excretory organs in cockroaches.
   4. The doctor uses the _______________ to hear the heartbeat.
   5. The urine formed in the kidneys goes into _______________.
   6. One complete rhythmic contraction of the heart followed by its relaxation is called a _______________.
   7. The vascular tissue for the transport of water and minerals in the plant is called _______________.
   8. The _______________ acts as a filter and removes the harmful substances from the blood.
4. 4.

   What is the function of pulmonary vein?

5. 5.

   Name two types of vascular tissues present in plants.

6. 6.

   Name the organ that pumps blood to all the parts of our body.