Homeostasis, The ability for your body to maintain a stable, internal environment, Cell, The smallest unit of all living things, Tissues, Made of a group of cells working to perform a specific function, Organs, A group of tissues working together to perform a specific task, Organ Systems, A group of organs working together to accomplish a task, Digestive System, Breaks down materials to be used by our cells and removes solid wastes from the body, Excretory System, Eliminates liquid and gaseous wastes from the body, Skeletal System, Provides structure, support, and protection for the body, Muscular System, Provides movement within the body, Circulatory System, Transports and delivers materials throughout the body, Respiratory System, Exchanges gases between our internal and external environment, Nervous System, Receives and sends messages from our external and internal environment, Heart, arteries, veins, Organs of the circulatory system, Stomach, esophagus, intestines, Organs of the digestive system, Brain, spinal cord, Organs of the nervous system.

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