Fill in the blanks: lack of oxygen can eventually stop the heart (cardiac arrest) and prevent blood from reaching the brain and other vital organs in as little as minutes after submerging. brain cell damage or death begins to occur within minutes.

The correct answer will be-

1) 3- 4 minutes

2) 4-6 minutes

Explanation:

Continuous supply of oxygen and other nutrients to organs in the body is very important to live.

The function of pumping the oxygen and nutrients to organs via blood is performed by the heart which if gets blocked, block the supply to the organs.

The first organ to be affected by a shortage of the brain is the brain as brain cells are very sensitive to oxygen. Without oxygen, cells begin dying only after 4 minutes and permanent death occur between 4 to 6 minutes. This condition is known as Cerebral hypoxia.

Thus, 3- 4 minutes and 4-6 minutes are correct.

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