Veins carry blood from the body to the heart.
Arteries carry blood from the heart to the body.
Your answer is: arteries
Hope that helped:)
Matter cannot be created or destroyed. this means that the number of atoms before the reaction has to equal the number of atoms after the reaction.
8000 plant species in the California Floristic Province
Answer:
the oxygen should be concentrated in the alveoli
Explanation:
Diffusion: The movement of molecules from a region og higher concentration to a region of lower concentration.
So when the Oxygen is concentrated in the alveoli only then it can move towards the blood
Diffusion is a passive transport system which means it doesnt need energy in the form of atp molecules
if the molecules move from a region of lower concentration to a region of higher concentration it needs atp molecules which is energy and is called active transport system
