There are 13 body systems used by the human body to maintain health and functionality.
These 13 human body systems are interrelated and thus, work together to perform and set their designated functions to help the organism survive in their everyday niche and other elements.
Answer:
A black hole
Explanation:
A black hole is very dark. And it's also an opening.
Answer:
Greece
Explanation:
it was originated in ancient greece
The sympathetic nervous system causes a speeding up of bodily functions (i.e. heart & respiratory rates) & protects the core by shunting blood from the extremities to the core !! hope this helps hun. have a great day ☺️
