Question

an average healthy adult has about two of blood, and it takes approximately 60 for the cycle to be completed.

Explanation:

This is a basic human physiology fact. The typical blood volume for a healthy adult is around 5 liters, and the full circulation cycle of blood takes roughly 60 seconds (1 minute).

Answer:

An average healthy adult has about two liters of blood, and it takes approximately 60 seconds for the cycle to be completed.

Note: The standard adult blood volume is 4-5 liters, so "liters" is the correct unit here; the circulation time is commonly cited as ~60 seconds.