The body system that takes in, breaks down, and absorbs nutrients that are necessary for growth and maintenance; Major Organs: Mouth, Esophagus, Stomach, Small Intestines, Large Intestines, Rectum/Anus

The cells and tissues that recognize and attack foreign substances in the body

the body system that covers and protects the body; major organ is the skin

The body system that protects and supports the body; provides shape and support, allows movement, protects tissues and organs, produces blood cells. Major organs: Bones

Groups of similar type of cells that perform the same function

A group of two or more organs working together for a specific job.

Example: the digestive system

The body system that sends messages from the brain to other organs through your nerves. Allows you to see, hear, touch, smell, taste and to respond to these senses.

Major Organs: Brain, Spinal cord, Nerves

A structure made up of different types of tissues that work together to do a specific job.

Example: The heart is made of muscle and connective tissue

The body system that produces movement by pulling on your bones.

Major organs: Muscles

The body system responsible for carrying materials throughout the body. Major Organs: Heart, Blood Vessels, Blood

The body system that helps rid the body of wastes, excess water and urea. Major Organs: Kidneys, Ureters, Bladder, Urethra

The smallest unit of an organism that can perform life functions. May be specialized such as nerve, blood, or bone cells.