The Object Masses, will affect the force of gravity between the two objects, and the distance between the objects will affect the force of gravity between the two objects.
Smooth ER versus Rough ER
The species that you and all other living human beings on this planet belong to isHomo sapiens. During a time of dramatic climate change 200,000 years ago, Homo sapiens evolved in Africa. Like other early humans that were living at this time, they gathered and hunted food, and evolved behaviors that helped them respond to the challenges of survival in unstable environments.
The systems are:
Nervous system: this is because the brain sends out commands to the body or it signals other parts which makes your body move like walk or to pick something up.
Muscular system: the muscular system such as your bones and muscles is what keeps the bones together so you could move/walk.
Hope this helped :)
Have a great day
