Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Interstitial fluid are all hormones secreted into before entering the circulatory system.
Where are all hormones secreted into before entering the circulatory system?

Aerobic exercise helps improve the cardiovascular system, while anaerobic exercise causes muscles to get bigger and stronger.
Aerobic exercise helps improve the cardiovascular system, while what exercise causes muscles to get bigger and stronger?

Inherited traits are features that are passed from one generation to the next.

What type of traits are features that are passed from one generation to the next called?