Answer:
B
Explanation:
It removes other waste from our body and keeps our blood clean
Answer: it produced oxygen as a waste product
Explanation: there was more free oxygen
The epidermis is the 5 top layers, and the dermis is the 2 inner layers
Answer:
C. top soil has more organic matter.
Explanation:
It's more fertile than subsoil, due to having more organic matter and because fertilizers are usually added to the topsoil only.
There are 11 major organ systems in the body.
