Answer:
many alveoli are present in the lungs with a shape that further increases surface area. Thin walls - alveolar walls are one cell thick providing gases with a short diffusion distance. Moist walls - gases dissolve in the moisture helping them to pass across the gas exchange surface.
Explanation:
Answer:
It allows information to go from one neuron to another through neurotransmitters.
The level of organization is plants, coral and water. Water came first.
Answer:
DNA tightly coils around proteins and condenses into chromosomes, which fit in the nucleus.
Explanation: