How is the lower respiratory system related to the circulatory system?
The lower respiratory system moves oxygen
into the blood; the circulatory system delivers
blood to the body.
The lower respiratory system delivers blood
to the body; the circulatory system moves
oxygen into the blood.
The lower respiratory system moves oxygen
into the blood; the circulatory system delivers
air into the lungs.

What substance is the most acidic. lemon juice. tomato juice. sodium hydroxide. water

The human body needs energy in order to carry out life processes such as breathing. where does the body get this energy? a. from eating food b. from learning about new things c. from lying in the sun d. from sleeping

How does the fossil record provide evidence that the modern whale evolved from the anthracotheres? a) the modern whale looks like their ancestor the anthracotheres. b) the modern whale has all of the same structures as their ancestor. c) there is not enough evidence to suggest the the modern whale evolved from the anthracotheres. d) the anthracotheres has a structure that is still present in the modern whale, but is no longer of use to the modern whale.