There is the
endocrine system
cardiovascular system
skeletalmuscular system
respiratory system
gastrointestinal system
genitourinal system
neurovascular system
and the skin.
They both can be made by humans and they both can be natural.
Humans do not get headaches from high and low pressure systems.
There are many similarities between fish and humans. Fish and humans have many of the same organs. We both have a digestive system and a reproductive system.
Systems that run by themselves and don't need humans to control them.
i think they do
Evolution.
digestive system
Eight or Nine main organs, but I'm not sure which one... I hope this helped you.
Same as humans
YesYes, we are.
humans often cause change to systems in nature.
yes i think