C. the amount of calories
Answer:
A habit is a behavior that is repeated so often that it becomes almost automatic. One healthy habit I have is being sure to get lots of sleep on the weekend to make up for lost sleep during the week. One unhealthy habit I have is forgetting to eat vegetables.
Explanation:
Answer:
The cardiovascular system maintains homeostasis through the circulation of blood and, therefore, oxygen and nutrients to organs and tissues.
Explanation:
Answer:
the esophageal sphincter
Explanation:
This muscle opens and lets food and liquid enter the stomach and closes to prevent the food and liquid from leaking back into the esophagus, however if it is not working properly it could open and close at the wrong times
