Answer:
The modification allows the stomach to churn, mix, and pummel the food, breaking it down to smaller fragments.
Answer: d
The respiratory and circulatory systems bring oxygen and nutrients to the cells. The respiratory and circulatory systems work together to maintain homeostasis. The respiratory system moves gases into and out of the blood. The lungs contain the bronchi, bronchioles, and alveoli.
Explanation:
Explain that even though he has already had sex, it is ok to change his mind.
Suggest that he talk to a trusted adult.
The other options may offend a person
Answer:
building blocks of proteins , found in dna and rna , considered as complete proteins
