Answer: Vitamins
Explanation:
Vitamins play a very vital role in the human system, they are considered as essential nutrients which perform hundreds of roles in the body, some of those roles are building the bones, healing wounds, strengthen the immune system, repair damaged cells and conversion of food to energy. It's function spans into 13different category.
Answer:
The endocrine, nervous, and muscular systems work together and maintain temperature homeostasis. Insulin, a hormone released from the pancreas, works with the digestive system and maintains energy homeostasis.
Ossification is the correct answer
No we all have a voice inside your heads
I hope that this helps however if you still think that you are maybe talk to your doctor