Human reproduction<span> takes place as internal fertilisation by sexual intercourse. During this </span>process<span>, the male inserts his penis, which needs to be erect, into the female's vagina, and then either partner initiates rhythmic pelvic thrusts until the male ejaculates semen, which contains sperm, into the vaginal canal.</span>
Viral diseases cannot completely be healed while bacterial diseases can completely be healed.
They weaken body cells.
Explanation:
When we get a disease, the white blood cells try to fight it but when the disease is too strong and our immunity is low signs and symptoms show then when you take the medicine a persons immunity will be back and be able to fight the disease.
