I would say minor changes.
brainiest is appreciated!
Health - related fitness.
I hope this helped :)
The heart is the system's pump and the blood vessels are like the delivery routes and it is a muscle. The pumps are the beat. The heart is a muscle about the size of a fist and it is the muscle in the body that works the hardest. The statement that the heart muscle rests only between beats is true
Answer:
They are the most effective way of inserting medicine.
If they weren't needles, they would definitely be used more.
Explanation:
Many times vaccines need to be administrated into muscles and strong tissue, so they need a needle to get all the way through. Other ways of giving vaccines are proved to be less potent and do not work as well.
Research also shows that 24% of parents fear needles and 63% of children fear needles.
