Give reasons:
(a) Ventricles have thicker muscular walls than atria.
(b) Transport system in plants is slow.
(c) Circulation of blood in aquatic vertebrates differs from that in terrestrial vertebrates.
(a) Ventricles have thicker muscular walls than atria.
(b) Transport system in plants is slow.
(c) Circulation of blood in aquatic vertebrates differs from that in terrestrial vertebrates.
Answers & Comments
Answer:
a) The muscular walls of ventricles are thicker compared to atria as they have to pump blood out of the heart. They pump blood at a higher pressure to ensure it reaches all parts of the body.
b) Their transport system is slow compared to that of other species as the majority of plant cells are dead and they don't possess any pumping machinery such as the heart. In addition, they are non-motile organisms and thus do not have a high energy requirement.
c) The terrestrial animals intake oxygen from the air through the lungs, whereas aquatic animals take oxygen from the water via gills. Thus, the circulatory system present in terrestrial vertebrates is different from that in aquatic vertebrates.
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