Answer:
i think carbon dioxide
Explanation: because it needs that to make sugar to survive
Cell, tissue, organ, organ system, organism if that’s what you are referring to
Answer:
Weakening of digestive smooth muscle with age can cause constipation.
Explanation:
Smooth muscles in the digestive system have the role to move food down the tract via radially symmetrical contractions (peristalsis). With age, the function of smooth muscles reduces, causing the food to move more slowly through the alimentary canal (digestive tract). As a consequence, water gets absorbed from food waste, which can cause constipation.
The brain imaging technique you refer to is the MEG.
