After the blood leaves the heart... A. it goes to straight to the kidneys to filter out wastes
B. it enters the veins
C. it enters the capillaries
D. it is full of oxygen

Which of the following are the functions of the skeletal system? blood cell production in soft marrow tissues and mineral reserves largest organ of the body for defense and support vitamin d production and pumping blood through vessels voluntary movement and contractile movement

Which of the following are false concerning microbes? a. microbes generate oxygen through photosynthesis.b. the primary role of microbes on the planet involves causing disease in animals and humans.c. microbes produce vitamins in the intestines.d. microbes play a role in breaking down waste and decomposing dead organisms.

What is thought to have caused the mass extinction at the end of the cretaceous period?