The alveoli in the lungs, the nephrons in the kidneys, and the villi in the small intestines are all surrounded by capillairies. This allows the body to efficently exchange materials with what system?

i think the answer is 95 hope this

explanation:

the sun shines white and black light to our planet. the white light has all the colors in it. in our upper atmosphere, we have dust particles and oxygen molecules. the white light meaning all of the colors in a rainbow shines through the upper levels of the atmopshere and the blue light scatters across the entire planet. that is why our sky is blue.