existen muchas similitudes entre un cultivo de bacterias vivas de un pequeño ecosistema y un grupo de seres humanos viviendo en un ecosistema grade. haz una lista de similitudes

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.