OBJECTIVE LIFE SCIENCE
ANIMAL PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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THIS ANIMAL HAS A TRANSPORT SYSTEM BUT LACKS CAPILLARIES
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A
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B
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C
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None of the above
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Explanation:
Detailed explanation-1: -Animals such as sponges and Hydra do not posses any circulatory system. The water in which they live brings food and oxygen as it enters their bodies. The water carries away waste materials and carbon dioxide as it moves out. Thus, these animals do not need a circulatory fluid like the blood.
Detailed explanation-2: -The Structure of the Transport System Transport in both plants and mammals is by a system of specialised tubes. The smallest of these tubes-capillaries-may have a lumen of 5-8µm whilst veins may have lumens of 3cms diameter. In mammals this forms a circulatory system of arteries, capillaries and veins.
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