The answer are the hands and feet. It is the continuously changes of the
characteristics of the body, most noticeable in height and weight. The ages 13-15 and 17-18 the two major brain
growth spurts occur. In times of growth spurts the changes is visible during the
first year of puberty.
Answer:
because theyre in our bodies and they have to be small to be in our bodies
Explanation:
The answer is adverse reactions
Atom
Molecule
Organelle
Cell
Tissue
Organ
Organ system
Organism