UNIT 2 VOCAB BODY SYSTEMS UNIT CELLS Smallest

UNIT 2 VOCAB BODY SYSTEMS UNIT

CELLS Smallest unit of an organism that can perform life functions, basic unit of life.

CIRCULATORY SYSTEM Transports nutrients and oxygen to the body

DIGESTIVE SYSTEM Breaks down food to provide nutrients and energy; gets rid of solid waste.

EXCRETORY SYSTEM Removes waste from the body, urinary system is part of the excretory system

MUSCULAR SYSTEM Provides movement of the body; consists of skeletal, smooth and cardiac muscles

NERVOUS SYSTEM Controls and coordinates the body’s activities; sends messages to and from the brain, spinal cord and nerves

NEURONS Nerve cell, carries messages between the brain and other parts of the body

ORGAN Structure in an organisms, made of two or more tissues which has a specific function

ORGANISM A living thing – consisting of a single cell or multiple cells

ORGAN SYSTEM A group of organs that work together to perform one or more functions

PERISTALSIS Muscular contractions that move food through the digestive system

RESPIRATORY SYSTEM Exchanges oxygen and carbon dioxide

SENSORY RECEPTORS A sensory nerve – has a nerve ending that responds to stimulation

SPECIALIZED CELLS Special cells in multicellular organisms that are modified to carry out a particular function

SYSTEM Interacting, interrelated, or interdependent elements forming a more complex whole

TISSUE A group of cells that work together to do a specific job