Pulmonary veins: A) split off the pulmonary trunk
B) transport oxygenated blood to the lungs
C) return blood to the right atrium of the heart
D) transport oxygenated blood to the heart

Which system revise and send electrical signals throughout the body

Eutrophication caused by human nutrient pollution.

Which of the following is true of metabolism in its entirety in all organisms? a) metabolism depends on a constant supply of energy from food. b) metabolism uses all of an organism's resources. c) metabolism consists of all the energy transformation reactions in an organism. d) metabolism manages the increase of entropy in an organism.