Biology
Assertion (A): Blood is the fluid medium of the human circulatory system, responsible for transporting nutrients and excretory wastes, but it does not carry oxygen or carbon dioxide gases.
Reason (R): Oxygen and carbon dioxide gases are transported through the lymph vessels from one part of the body to the other since they are in gaseous states.
- Both A and R are true.
- Both A and R are false.
- A is true and R is false.
- A is false and R is true.
Circulatory System
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Answer
Both A and R are false.
Explanation — Blood is responsible for transporting nutrients and excretory wastes, along with the respiratory gases (oxygen and carbon dioxide) throughout the body. Lymph vessels do not carry the respiratory gases as lymph contains WBCs only. Absence of RBCs (i.e. Haemoglobin) makes them unable to carry oxygen or carbon dioxide.
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