Groups of organs and tissues that work together to perform vital biological processes in an organism.

The system responsible for breaking down food into nutrients that the body can absorb and use for energy, growth, and repair. Includes the mouth, stomach, intestines, liver, and pancreas.

The system responsible for exchanging gases (oxygen and carbon dioxide) between the body and the environment. Includes the trachea, lungs, and diaphragm.

The system responsible for moving blood throughout the body, delivering oxygen and nutrients to tissues and removing waste products. Includes the heart and blood vessels.

The system responsible for supporting the body, protecting internal organs, and enabling movement. Includes muscles and bones.

The vascular tissue in plants that transports water and nutrients from the roots to the rest of the plant.

The vascular tissue in plants that transports sugars and other metabolic products from the leaves to the rest of the plant.

A vital biological process involving the physical motion of organisms or parts of organisms.

A vital biological process involving the intake and utilization of food and nutrients for energy, growth, and maintenance.

A vital biological process involving the exchange of gases, primarily oxygen and carbon dioxide, to produce energy.

A vital biological process involving the increase in size and number of cells, leading to the development of an organism.

A vital biological process involving the production of new individuals, ensuring the continuation of a species.

The process by which nutrients from digested food are taken into the body's bloodstream.

The process in the respiratory system where oxygen is taken into the body and carbon dioxide is expelled.

Substances obtained from food that are necessary for the maintenance of life and growth.

The reliance of biological systems on each other to carry out vital biological processes.

The process by which moisture is carried from the roots of a plant to the leaves, where it changes to vapor and is released into the atmosphere.

The process by which green plants use sunlight to synthesize nutrients from carbon dioxide and water.

The movement of substances such as blood or sap within an organism.

The breakdown of food into smaller components that can be absorbed into the bloodstream.

The process of swapping one gas for another, especially in the lungs or gills of organisms.

Mechanisms within organisms that move essential substances to where they are needed.