Intestinal-fortitude Sentence Examples

Underneath your skin, organs, muscles, nerves, and bones are hard at work. They keep you alive and healthy without you even realizing it. But how do these body systems work? Learn all about the main human body systems and how they function with helpful charts and descriptions.

Bacteria are the plural of bacterium, which are microscopic one-celled organisms. They are found everywhere and can be harmful, as in bacterial infections, or they can be beneficial, as in fermentation or decomposition. The three main bacteria shapes are coccus, bacillus and spiral. Keep reading for examples of bacteria in each of these three types.