The photograph labeled K is an intact mammalian heart while photograph K1 and K2are sections of a mammalian heart .Examine them

      

The photograph labeled K is an intact mammalian heart while photograph K1 and K2are sections of a mammalian heart .Examine them
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The vessels labeled A and B drains blood in a chamber that leads to another chamber labeled J. The blood vessel labeled 3 drains blood into the chamber labeled L. When water is pumped under low pressure through vessel 3, it flows out through the vessel labeled 4. When water is pumped under low pressure through vessels A and B it flows out through the vessel labeled 2.
i. Name the chambers labeled Land J
ii. Name the blood vessels 2,3 and 4.
iii. Observe the walls of chamber J and those of chamber N in the sections of the heart. Account for the difference in the thickness of the walls.
iv. Name the structure labeled H and state its role.

  

Answers


sharon
i. L-Left auricle/autrium
J-Right ventricle
ii. 2-Pulmonary artery
3-Pulmonary vein
4-Aorta
iii. Wall of N/Left ventricle is thicker than the wall of J/Right ventricle. This is because the left ventricle pumps blood for a longer distance to all parts of the body, hence requires to exert more force. Chamber J pumps blood for a shorter distance /only to the lungs hence requires to exert less force.
iv. Tricuspid valve/right atrio-venticular valve. It ensures that blood flows in only one direction from the right atrium to the right ventricle and not the other way round.
sharon kalunda answered the question on September 18, 2019 at 10:40


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