Which organ in the integumentary system keeps germs from entering your body?

The main organ of the integumentary system is the skin.

Explanation: The skin regulates body temperature, keeps germs from entering your body, and produces vitamin D to help absorb calcium.

cats appear to have glowing cat eyes because the back of their eyeballs includes a special reflective surface called the tapetum lucidum. this lets them see better during the night, giving them a much better vision.