Â© 2013 WebMD, LLC. All rights reserved. The teeth are the hardest substances in the human body. Besides being essential for chewing, the teeth play an important role in speech. Parts of the teeth include: â¢ Enamel: The hardest, white outer part of the tooth. Enamel is mostly made of calcium phosphate, a rock-hard mineral. â¢ Dentin: A layer underlying the enamel.
While they are often used synonymously, the terms infectious disease and communicable disease do not have the same meaning. A communicable disease is an infectious disease that is easily spread from one human to another.
What are the communicable diseases? a communicable disease is also known as an infectious disease, contagious disease, or a transmissible disease. a communicable disease is one which is clinically evident (shows â¦ characteristic signs and symptoms) and can result from infection/presence/growth of a pathogen. communicable disease is a disease that can be passed on in one way or another from a Carrier of the disease to some one else. and is usually th â¦ e result of a virus or bacterial infection. 17 people found this useful.