Brain and Nervous System

What parts make up the central nervous system?

• brain

• spinal cord

• autonomic nervous system

• somatic nervous system

Part of the nervous system that extends out from the spinal cord to the rest of the body

• central nervous system

• peripheral nervous system

• brain

• cerebral cortex

Nerve cells that run through our entire body that send and receive messages with each other; look like trees

• neurons

• dendrites

• axons

• synapses

Identify the parts of the neuron.

a

b

c

d

e

f

Cell Body

Dendrites

Myelin Sheath

Nucleus

Axon

Axon Terminal

The part of a neuron that receives information from other neurons and passes it along through the cell body

• synapse

• dendrite

• axon terminal

• cell body

The part of a neuron that transmits messages away from cell body; covered by myelin sheath

• synapse

• dendrite

• axon

• axon terminal

The part of a neuron that covers the axon; helps speed up the the transmission of message; white fatty substance that also insulates the axon

• synapse

• dendrite

• myelin sheath

• axon terminal

Part of a neuron gaps in the myelin sheath that don't cover the axon.

• synapse

• Schwann cell

• nodes of Ranvier

• axon terminal

Small fibers branching out at the end of a neuron that send messages out to other neurons

• synapse

• Schwann cell

• nodes of Ranvier

• axon terminal

The area between the axon terminals where messages are sent and dendrites that receive the message

• synapse

• Schwann cell

• nodes of Ranvier

• cell body