The brain is located inside the skull and is made up of neurons that communicate via electrical and chemical signals. It is split into two hemispheres and connected to the spinal cord via the brain stem. The brain controls the body's functions and houses thoughts, memories, feelings and emotions. It receives sensory input and sends motor commands via different types of neurons. Major parts include the cerebrum, cerebellum and brain stem, each with distinct roles in voluntary movement, balance, involuntary functions and sleep regulation.

1. The Brain

2. Location and Description
● Located inside your skull
● Not very large, size of a head of
cauliflower
● Controls the body
● Houses your thoughts and memories
● Creates your feelings and emotions

3. What makes up the brain?
● Mostly made up of neurons
● Neurons are cells that can transfer information to and
from the brain
● Split into two different
hemispheres, the left
and right hemispheres
● Each hemisphere
controls opposite side of
body

4. Connecting the brain to the body
● The brain stem connects the brain to the spinal cord
● The spinal cord sends messages from the brain down to
the rest of the body
● The spinal cord is filled with
interneurons, neurons that transmit
information

5. Three Major Types of Neurons
● Sensory Neurons
o Receives information from outside world through
senses such as sight, taste, smell, and transmit
them to the brain
● Motor Neurons
o Sends messages from brain to muscles to move
● Interneurons
o Transmits information from sensory neurons to the
brain and from the brain to motor neurons

6. Major Parts of the Brain
● Cerebrum
● Cerebellum
● Brain Stem

7. Cerebrum
● Largest part of the brain
● Allows you to move your body on your
command
● Center of thoughts,
personality, and receives
information from sensory
neurons

8. Cerebellum
● Second largest part of brain
● Controls involuntary movement, or
movement that is not controlled
by thoughts such as breathing
● Also controls balance and
posture

9. Brain Stem
● Connects brain to spinal cord
● Controls life supporting systems such as
heart rate and digestion
● Also regulates sleep

10. Brain Stem
● Connects brain to spinal cord
● Controls life supporting systems such as
heart rate and digestion
● Also regulates sleep