Answer:
21
Explanation:
17+14. you will get the answer.
Answer:
They're not dangerous they're just valveless venous structures that connect to the skull bones and are a crucial part of the brain to funcion with some sort of infection thing im not really sure, but long story short, dont damage them its bad
Explanation:
the respiratory system and the circulatory system work closely together to deliver oxygen to cells and to get rid of the carbon dioxide the cells produce.
