Answer:
The process of the quality of something or condition of someone starts to slowly decrease
Explanation:
Organic matter in soil is also called humus.
Answer: a trillion cells
Explanation:
Cells are the basic building blocks of living things. The human body is composed of trillions of cells, all with their own specialised function. Cells are the basic structures of all living organisms
Answer:
It provides the cells with oxygen
It increases blood volume reducing the flowrate of blood