Fact 1: Endocrine hormones travel throughout the body in the blood. Fact 2: Hormones, produced by the endocrine system, act as chemical messengers targeting specific organs. Given the two facts above, what travel throughout the body in the blood?

A). testes;
B). matter vibrating;
C). zygotes;
D). gametes;
E). kinetic energy;
F). chemical messengers;
G). Veins and arteries.;
H). electromagnetic energy;
Answer:
F).