How can the field of material science engineering be applied to human body system?

In addition, sperm receive a chemical fluid from the

Why would one lymph node in the neck be swollen and not the other? what causes them to swell?

What typically happens when a family member has a problem with alcohol or drugs? adults in the family are affected more than children children in the family are affected more than adults. the entire family is affected. no one in the family is affected.