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The transport system of the body responsible for carrying oxygen and nutrients to the body and carrying away carbon dioxide and other wastes; composed of the heart, blood vessels, and blood
The group of organs that break down foods into chemical components that the body can absorb and use for energy and for building and repairing cells and tissues.
The bodily system that in vertebrates is made up of the brain and spinal cord, nerves, ganglia, and parts of the receptor organs and that receives and interprets stimuli and transmits impulses to the effector organs.
Collection of tissues which performs a particular function or set of functions in an animal's body. The heart, brain, and skin are three organs found in most animals. Organs are composed of tissues and may be organized into larger organ systems.
A system of organs, functioning in the process of gas exchange between the body and the environment, consisting especially of the nose, nasal passages, nasopharynx, larynx, trachea, bronchi, and lungs.
A collection of components organized to accomplish a specific function or set of functions.