Endocrine hormones travel throughout the body in the blood.
Hormones are the chemical messengers of the body's endocrine system.
Chemical messengers travel throughout the body in the blood.
what travels throughout the body in the blood?

[a] chemical messengers
[b] carbon monoxide
[c] Veins and arteries.
[d] bacterial messengers
[e] density
[f] kinetic energy
[g] electromagnetic energy
[h] matter vibrating