Answer: 2,3,5,1,4 I hope I helped if thats what you wanted me to do for ya. I put them in order.
Valves, they are like flaps of muscle that keeps the blood in its place util its ready to be pumped along.
Answer:
killer T
Explanation:
helper T activates killer T cells which literally kill the virus or bacteria. memory T are the subset of an infection.
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Answer:
A nerve cell, or neuron, is a cell that receives information from other nerve cells or are sculpted in other ways, for example, to allow one to see patterns. these “acrobats” became very good at the task over a month or so of practice.
Explanation:
