Scientists are extremely observant when they examine the natural world. what information do scientists collect when they observe the natural world?

stridor can't collapse a lung.

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.

a. to encourage apoptosis

layer 3 is younger than layer 6.