let me help you :) im good at biology like i love it so much ;)
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What do you think that a very wide space between two contour lines means?
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B.MOUNTAIN TOP</span>
Answer:
"pumps blood against a greater resistance" that the answers. hope this helped
Answer:White blood cells, also called leukocytes or leucocytes, are the cells of the immune system that are involved in protecting the body against both infectious disease and foreign invaders. All white blood cells are produced and derived from multipotent cells in the bone marrow known as hematopoietic stem cells. Leukocytes are found throughout the body, including the blood and lymphatic system.
Explanation:
