1st options A. gamete B. embryo C. fetus
2nd options A. gametes B. Zygotes C. embryos

embryo, gametes

hormones in blood stream

image: dtc.ucsf.edu

endocrine glands secrete hormones into the blood stream near them; the hormones then travel in our bloodstream until it reaches its destination, called a target cell, in distance parts of the body. in the target tissue, hormones lock onto the target’s plasma membrane, called the receptor site.

not sure what it is