Chapter 12- Lesson 12.1

Another name for infectious diseases is ______________ ____________ because they can be transmitted from one living thing to another.

A ___________ is a sign of disease that can be outwardly measured.

_______________ cause the familiar symptoms and signs of illness such as pain, inflammation, and headaches.

Microorganisms are found everywhere and are typically ___________ to the naked eye.

______________ are single-celled organisms and most can grow independently outside of your cells.

_____________ are pathogens that infect cells and cause the common cold and other illnesses.

An example of ___________ is athlete's foot.

_____________ are organisms that must live inside or on another living thing.

Mosquitoes play a part in transmitting malaria, which is a disease caused by certain

Worms can be transmitted in water or food that has been contaminated with human waste, and in undercooked ______________.