Concept explainers
Introduction: Hemolymph is the mixed fluid present in animals like Arthropods and Molluscs. It is an important constituent of their unique open circulatory system. The hemolymph helps to exchange the nutrients and the waste products from the body.
Answer to Problem 1TY
Correct answer: The hemolymph is the fluid that circulates in the body cavity of the animals like Arthropods and Molluscs. This cavity is called hemocoel. Hence, the correct answer is option b.
Explanation of Solution
Reason for correct answer:
The hemolymph enters the blood vessels in the Molluscs, while in Arthropods it directly enters the heart of the organism.
Option b. is given as, “is a mixture of fluid in blood vessels and the hemocoel”.
Hemolymph is the fluid present in the cavity called the hemocoel in Arthropods. In Molluscs, it enters the heart through blood vessels. Hence, the correct answer is option b.
Reasons for the incorrect answer:
Option a. is given as, “does not contain blood cells”.
Hemolymph is the fluid that contains the blood cells. It is required to transport nutrients and waste materials in the body of an animal. Hence, option a. is incorrect.
Option c. is given as, “circulates through closed circulatory systems only”.
The hemolymph is a feature of the open circulatory system present in the Arthropods and Molluscs. Hence, option c. is incorrect.
Option d. is given as, “functions only in defense of the body and not transport”.
Hemolymph is used to transport waste material to the excretory organs and nutrients to the rest of the body. Hence, option d. is incorrect.
Option e. is given as, “does not pass through a heart”.
The hemolymph enters the heart directly in Arthropods, and through blood vessels in Molluscs. Hence, option e. is incorrect.
Hence, the options a., c., d., and e. are incorrect.
The Arthropods and the Molluscs have a unique feature of an open circulatory system where the hemolymph is present freely in the hemocoel (body cavity) and is not confined to unique vessels.
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Chapter 47 Solutions
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