Tapeworms and lice are examples of parasites that can cause diseases in humans. A parasite lives in or on a host organism and benefits by deriving nutrients at the host's expense. Tapeworms are intestinal parasites while lice are skin parasites.
Appearance is a huge factor with food it can help you determine if it was cooked right or if it looks appetizing. This is true for me because if it doesn't look good I have doubts if it will taste good