Answer:
2. the trachea widens and lengthens.
Explanation:
Moist, smooth tissue called mucosa lines the inside of the trachea. The trachea widens and lengthens slightly with each breath in, returning to its resting size with each breath out.
Answer:
in my opinion it affected young people because nowadays young ones are addicted to a juul or other vape like things but it can ruin your brain cells
Explanation:
Answer:vitamin Y and vitamin Z are the essential nutrients.
Explanation:
When the researcher treated the mouse cells in the absence of vitamin W and X, the cells survived but when he eventually removed vitamin Y and Z the cells died. This implies that for the cells to grow and survive Vitamin Y and Z which are the essential Vitamin needs to be present. Thanks alot. I hope it helps!
Answer:
Placenta
Explanation:
The placenta is a temporary organ that "provides oxygen and nutrients to your growing baby and removes waste products from your baby's blood." https://www.mayoclinic.org/healthy-lifestyle/pregnancy-week-by-week/in-depth/placenta/art-20044425
i'm gonna say mouth
Explanation:
when food comes in contact with the brush border it begins digestion