Identify the microorganism in the picture and write any one important feature of it ?

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.

it is either c or d and i know for sure it is not a or b

trachea, alveoli, lung capillaries, arteries