Answer:
When a child is conceived each parent gives 23 of their chromosomes
Homologous chromosomes are separated during anaphase of meiosis.
Because one of them dies and another one doesn’t
The two upper chambers are the atria or auricles. They are the left and right atriums
Function of integumentary system: PROTECTION<span>- barrier against infectious, chemical, radioactive, and physical damage.
- keratin and junctions block bacteria, fungi, and blunt objects.
-macrophages identify foreign particles and activate immune response.</span>