Oxygen, it takes in Carbon Dioxide and releases Oxygen as a waste :)
uterus It passes through the fallopian tube into the uterus, where it attaches to the uterine wall. The placenta, which will nourish the baby, also starts to form.
Answer:
1.)Cathode rays are charged particles called corpuscles.
2) These corpuscles are the constituents of the atom.
3) They are the only constituents.
Explanation:Hope This Helps
They should be carbohydrates, fats (lipids) and protein. they are labelled as primary food substances and they're essential to life. they can provide energy and raw material for life processing. although mineral ions and vitamin are important too, but they only need a small amount.
