Nervous System

Brain, Spinal Cord, and nerves

Cell that carries nerve impulse information

Delivers impulses to the cell body

Contains the nucleus and organelles

Carries electrical Impulses away from the cell body

Insulates nerve fibers

1- Dendrite: Branching tree lie extensions 2- Cell Body: The main body whats connected to the Dendrites 3- Axon: Long Drake that connects to the cell body 4- Myelin sheath: Fatty insulating layers wrapped around the Axon in segments

Brain Chemical

When a , message reaches the end of a cell, neurotransmitter moves across the synapse of the Axon to the Dendrite of the next cell delivering a chemical message.

-Receive and responds to information form inside and outside the body -Regulates body function through stimulus and response -Mainains homeostasis

-Central nervous system( CNS ) - Peripheral Nervous System (PNS)

-Brain -Spinal Cord

-Brain: Controls center of the body -Spinal Cord: Links brain with body nerves, controls reflexes protected by vertebrae

Includes all nerves branching CNS to body CNS and PNS work together to respond to stimuli in your surroundings through the five senses

• Stimuli: Something that triggers a reaction to something else( Can be external or internal )

1-Vision: Light stimulates rods (dim light) and cones (colors ) and sends impulse to brain 2- Hearing: outer ear gathers sound waves that vibrate tiny bones and fluid which sends impulse to the brain 3- Smell and Taste: Molecules in air stimulates nerve cells in the nasal passages ( olfactory cells ) and on the tongue ( Taste buds ) 4- Touch: Receptors found in organs and skin detects changes in pressure, pain, and temperature

-Neuron: The basic functional unit of the nervous system, a specialized cell responsible for transmitting electrical impulses. -Nervous Tissue: A type of tissue that is made up of neurons and supporting cells, forming the structure of the nervous system. -Spinal Cord: A long, cylindrical structure made up of nervous tissue, containing neurons that transmit signals between the brain and the rest of the body. -Nervous System: The most complex, made up of the brain, spinal cord, and peripheral nerves, responsible for coordinating the body’s responses to stimuli and maintaining homeostasis.

-Left Hemisphere: Primarily responsible for language, logic, reasoning, and analytical tasks. It controls the right side of the body. -Right Hemisphere: Handles creativity, spatial awareness, intuition, and visual tasks. It controls the left side of the body.

1- Thalamus 2- Optic Nerve 3- Optic tract 4- Optic tract 5- Midbrain 6- Pons 7- Medula Oblangauta 8- Spinal Cord

Carys out task such as walking writing. Also helps us stay balanced and upright

It could cause weight gain due to lack of physical movement

The brainstem functions as the control center for many vital involuntary bodily functions like breathing, heart rate, blood pressure, swallowing, and consciousness, essentially acting as a bridge between the brain and spinal cord, relaying messages to regulate these automatic actions necessary for survival

The largest part of the brain, the cerebrum initiates and coordinates movement and regulates temperature. Other areas of the cerebrum enable speech, judgment, thinking and reasoning, problem-solving, emotions and learning. Other functions relate to vision, hearing, touch and other senses