Answer:
The circulatory system
Explanation:
The circulatory system, also called the cardiovascular system or the vascular system, is an organ system that permits blood to circulate and transport nutrients (such as amino acids and electrolytes), oxygen, carbon dioxide, hormones, and blood cells to and from the cells in the body to provide nourishment and help in fighting diseases, stabilize temperature and pH,
They are saying that every theory can eventually be changed a bit due to further research. It does not mean the theory is bad, just that it can become better.
A because theres not enough prey to support it.
This is why humans should have less kids and adopt if they want a kid. solves world hunger and overpopulation
Erythropoietin is a hormone that is released from the kidneys to stimulate the production of red blood cells.
Alexander Fleming discovered the penicillin in 1928. He noticed that some bacteria he had left in a petri dish had been killed by naturally occurring penicillium mould.The penicillin began the era of antibiotics, has been recognized as one of the greatest advances in therapeutic medicine. The research required to determine if the penicillium extract was safe and killed bacteria was done at Oxford University.P<span>rogram of animal experiments and clinical trials was carried.</span>
