Explanation:
The heart has four valves - one for each chamber of the heart. The valves keep blood moving through the heart in the right direction. The mitral valve and tricuspid valve are located between the atria (upper heart chambers) and the ventricles (lower heart chambers)
Answer: A B C D and E
the number of people in a population
the initial health of the individuals
the method of transmission
the low chances of a disease being passed on contact
the effect interacting with the same individuals over and over again
Explanation:
Just took on edg
Nerve Root cable extended
Answer:
they all have different charges
protons-positive
neutrons-neutral
electrons-negative