eleven organ sytems
Humans do not get headaches from high and low pressure systems.
They both can be made by humans and they both can be natural.
The difference between fetal pigs and humans systems is actually not that big. The humans are bigger than fetal pigs.
The digestive, respiratory and circulatory are three examples of organ systems that insects and humans have in common. Like humans, insects also have nervous, endocrine, muscular and reproductive systems.
Systems that run by themselves and don't need humans to control them.
Shell and legs
i think they do