Well if you are talking about humans, people say we have five fingers but technically we only have four fingers on either hand because our thumb is not considered as an "finger".
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:
Answer:
D, are showing responsibility
Max heart rate is calculated with the equation 220-age so 220-20 is 200
