Which is not a description of notmal aging

Complete the following sentence that describe the alimentary canal and its walls: the is composed mostly of connective tissue, nerves, and vessels, which to nourish surrounding tissues.

In regards to acetyl coa in the tca/kreb's cycle: how many cycles minimum would it take for an acetyl coa carbon to be removed? (what is the first step that this removal could happen? why can't we know for sure how many turns it takes?

Describe three different things you can do to improve your cardiorespiratory fitness rating. do not give three different forms of exercise. exercise is considered one way.