Which of the following is are the functon of the quot blood 39 1 Maintains body pH water and ionic b...........

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Which of the following is/are the functon of the "blood'-

1. Maintains body pH, water and ionic balances.

2. Maintains normal body temperature.

3. Helps in transportation of respiratory gases.

Select the correct answer using the code given below:

1 and 2 only

1 and 3 only

2 and 3 only

1, 2 and 3

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Explanation:

Blood is a body fluid in humans and other animals that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away from those same cells. In vertebrates, it is composed of blood cells suspended in blood plasma. Plasma, which constitutes 55% of blood fluid, is mostly water (92% by volume), and contains proteins, glucose, mineral ions, hormones, carbon dioxide (plasma being the main medium for excretory product transportation), and blood cells themselves.