Answer:
The immune system
Explanation:
The immune system is affected when the body is deficient of vitamins
Panic disorder is when someone is scared to have a panic attack, the symptoms are chills, sweating, hot flashes, shaking, and etc. possible treatments are medication, recognize that you're having a panic attack, and close your eyes. (Hope this helps!!)
ig d. 10-17 years old
but the actal age would be12-19 years old
Explanation:
The heart has four chambers: two atria and two ventricles.
The right atrium receives oxygen-poor blood from the body and pumps it to the right ventricle.
The right ventricle pumps the oxygen-poor blood to the lungs.
The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle.