Chapter 25 human body Flashcards
Central nervous system
The brain and the spinal cord
Peripheral nervous system
All of th part of the nervous system except for the brain and the spinal cord
Neuron
Nerve cells that is specialized to revive and conduct electrical impulses
Nerve
A collection of axons through which impulses travel between the central nervous system and other part of the body
Brain
The mass of nerve tissue that is the main control center of the nervous system
Integumentary system
The organ system that forms protective covering on the outside of the body
Reflex
An involuntary and almost immediate movement in response to a stimulus
Feedback mechanism
A cycle of events in which information from one step controls or affects a previous step
Retina
The light-sensitive inner layer of the eye. It receives images formed by the lens and transmits them through he optic nerve to the brain
Cochlea
A coiled tube that is found in the inner ear and that is essential to hearing
