Fact 1: Endocrine hormones travel throughout the body in the blood.

Fact 2: For the tourists, there are many places to travel.

Given the two facts above, answer the question "Endocrine hormones move from place to place through the" with the following options: 
- animals
 - ovaries
 - Man
 - humans
 - blood
 - hair
 - skin
 - scales


 

     blood    