PLEASE HELP Match these items.

1. cardiac muscle tiny air sacs

2. alveoli carries blood to lungs

3. pulmonary artery heart

4. breathing in inspiration

i don't know what the picture looks like but i can take a guess and say maybe basidiomycetes?

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.

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".