Which are gametes?
O
O
O
O
A. Estrogen and progesterone
B. Vas deferens and testes
c. Uterus and epididymis
D. Sperm and eggs

Answer D because they are also referred to as sex cells. Female gametes are called ova or egg cells and male gametes are called sperm.

trachea, alveoli, lung capillaries, arteries

colors do exist. the color of the sky is actually violet; humans percieve the color of the sky as blue.