Answer:
The reason is because the heart requires more oxygen when exercising. Several physiological events happen to increase the blood flow and therefore oxygen flow to that muscles,including the heart.
Also the volume of blood that the heart pumps out is maintained so that the body organs receive the necessary amount of oxygen and nutrition, because if it didn't adjust the flow of blood to match activity level, you will be insufficient. Either output method will be lower than needed.
Epithelial cells is the type of tissue that is designed to regulate temperature, secrete lubricants, and protect the body from harmful substances. Hope this helped! :)
is that the full answer or are there choices as well because that could make this easier to answer.
Answer:
Depending on their age, size, and activity level, toddlers need about 1,000–1,400 calories a day.
Explanation:
