2. In the human body…
Kidney (page 963) Lungs (page 919) Neuron (page 1049)

3. Lungs (page 919) http://health. howstuffworks

4. Neuron (page 1007) http://people. eku. edu/ritchisong/301notes2
Neuron (page 1007) Exchange

5. Neuron – nerve cell Prefix neur- always refers to something related to the nerves

6. Parts of a Neuron
Cell body: contains nucleus & most of the cytoplasm
Dendrites: projections that bring impulses into the neuron to the cell body.
Axon: long projection that carries impulses away from cell body 1 3 2

8. This is the pathway of a reflex
Types of Neurons
This is the pathway of a reflex
Interneuron
Synapse
Synapse
Sensory Neuron
Motor Neuron
Interneuron
Synapse
Muscle Contracts
Motor Neuron
Sensory Neuron

9. Where can the largest cells in the world be found?
Sensory Neuron
carry impulses from sense organs to spinal cord & brain
Fun Fact:
Where can the largest cells in the world be found?
The giraffe’s sensory and motor neurons! Some must bring impulses from the bottom of their legs to their spinal cord several meters away!!

10. Interneuron processes impulses in brain and spinal cord
- connect sensory and motor neurons

11. Motor Neurons
carry impulses from the brain & spinal cord to muscles & glands
Axon End
Axons branching out to muscle fibers

12. Human Respiratory System Diagram
Title Page
Human Respiratory System Diagram
Nasal Passage
Pharynx
Trachea
Bronchus
Bronchiole
Alveoli

13. Respiratory Overview Review
CO2
Air Passing over the mucus membrane of the nasal cavity is moistened, warmed, and filtered
Inside the lungs the Bronchi branch into small tubes called bronchioles
The Pharynx, or throat, is located where passages from the nose and mouth came together.
Respiratory Overview Review
At the end of the bronchioles are bunches of alveoli, air sacs, arranged like grapes on a stem
Air enters the trachea, or wind pipe which leads to and from the lungs
If one lobe is injured or diseased, the other lobes may be able to function normally
The trachea divides into two tubes called bronchi JH

15. Alveoli Picture Carbon Dioxide is dropped off Wall of the air sac
Here is a close
up picture of
your Alveoli
and a Capillary
surrounding it.
Capillary
Red Blood Cell
Oxygen is picked up
Carbon Dioxide is dropped off
Wall of the air sac MB

17. Fun Facts * The right lung is slightly larger than the left.
* At rest, the body takes in and breathes out about 10 liters of air each minute.
* The right lung is slightly larger than the left.
* The highest recorded "sneeze speed" is 165 km per hour.
* The surface area of the lungs is roughly the same size as a tennis court.
* The capillaries in the lungs would extend 1,600 kilometers if placed end to end.
* We lose half a liter of water a day through breathing. This is the water vapor we see when we breathe onto glass.
* A person at rest usually breathes between 12 and 15 times a minute.
* The breathing rate is faster in children and women than in men.