Available Answers

1. 1.

   Fill in the blanks.

   1. Blood is a fluid _____________ tissue.
   2. The liquid part of the blood is called _____________.
   3. Erythrocytes are red in colour because of the presence of a presence of a protein called _____________.
   4. _____________ carry blood from the heart to various parts of the body.
   5. _____________ are the fine blood vessels connecting arteries with veins.
2. 2.

   Why do you think veins have valves?

3. 3.

   Write true or false. Correct the false statements.

   1. The heart is enclosed in a double-layered membrane called pericardium.
   2. The upper chambers of the heart are called ventricles.
   3. The lower chambers of the heart pump the blood out of the heart.
   4. The circulation of blood between the heart and lungs is called systemic circulation.
4. 4.

   Tick the most appropriate answer.

   1. Which of the following blood cells are without nuclei?
      1. RBCs
      2. WBCs
      3. Blood platelets
      4. a and c
   2. Blood cells that protect the body from diseases are the 
      1. erythrocytes.
      2. leucocytes.
      3. thrombocytes.
      4. osteocytes.
   3. Which of the blood cells are responsible for the clotting of blood?
      1. erythrocytes 
      2. leucocytes
      3. thrombocytes
      4. lymphocytes
   4. The colour of the red blood cells are responsible  for the clotting of blood?
      1. haemoglobin
      2. oxygen
      3. carbon dioxide
      4. none of these
   5. The finest of all blood vessels are the 
      1. veins.
      2. arteries.
      3. venae cavae.
      4. capillaries.
   6. Blood group A has
      1. antigen A and antibody B.
      2. antigen B and antibody B.
      3. antigen A and antibody A.
      4. antigen O and antibody AB.
   7. The device used to hear heartbeats is called a 
      1. sphygmomanometer.
      2. manometer.
      3. thermometer.
      4. stethoscope.
5. 5.

   Fill in the blanks.

   1. ________________ are the blood vessels that carry blood away from the heart.
   2. ________________ are thin-walled upper chambers of the heart.
   3. Oxygenated blood is found in the ________________ side of the heart.
   4. The heart beats at an average of ________________ times per minute.
   5. The searching and relaxing of arteries with each heartbeat felt as throbbing is called ________________.
6. 6.

   Write true and false. Correct the false statements.

   1. Haemoglobin combines with oxygen to form carboxyhaemoglobin.
   2. Leucocytes are larger than erythrocytes and contain haemoglobin.
   3. Veins connect arteries with capillaris.
   4. The heart is enclosed  by a single membrane called pericardium.
   5. Deoxygenated blood is received by the right auricle.