Question:
how does a tumor form?
Answer:
En general, los tumores ocurren cuando las células se dividen y se multiplican excesivamente en el cuerpo. Normalmente, el cuerpo controla la división y el crecimiento de las células.
English:
In general, tumors occur when cells divide and multiply excessively in the body. Normally, the body controls the division and growth of cells.
The circulatory system works with the muscular system because then the muscles will be able to get oxygenated blood for the muscles to continue moving properly
I think both of them are positive feedback
<span>I believe it is called secondary succession.
I hope this helps!</span>