Title: Digestive System
1YOUR BRAIN
http//db.bbc.co.uk/science/humanbody/mind/article
s/disorders/causesofocd.shtml
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http//cranialsubluxations.com/the_human_brain.htm
3http//www.city.ac.uk/optometry/Biolabs/Brainlab/B
rainlab.htm
4http//www.city.ac.uk/optometry/Biolabs/Brainlab/B
rainlab.htm
5What can go wrong with your brain?
Aneurysm
- Bulging blood vessel that may rupture
- Smoking increases your risk of aneurysms
Alzheimers
- loss of neurons in brain ? decrease in size of
brain
- loss of memory and cognitive function ?
confusion
- Alcohol
- Can damage your cerebellum
? balance problems
- Tumors
- Abnormal growth of cells
6Aneurysm
Bulging Artery
7Alzheimers
2 million people in the U.S. have Alzheimers
8Alcohol affects on Your Cerebellum
9Tumors
10Spinal Cord
11http//teacherweb.ftl.pinecrest.edu/santarm/TriIII
2002/Diagrams/stretchreflex.htm
12Heart and Lung
13Functions of the Circulatory System
- To carry oxygen from lungs to the rest of the
body. - To carry digested food from the small intestine
to all areas in the body which need it. - To aid in the disposal of all wastes from the
body. - To distribute heat.
- To fight diseases by using white blood cells to
fight off infection.
14Components of the Circulatory System-Heart
- Divided into 4 chambers
- Right Atrium
- Receives deoxygenated blood from body
- Right Ventricle
- Receives the blood from the rt. atrium and pumps
it to lungs - Left Atrium
- Receives oxygenated blood from lungs
- Left Ventricle
- Receives blood from lf. atrium and pumps it to
the whole body
15Components of the Circulatory System-Vessels
- Arteries
- Carry blood away from the heart
- Have thick muscular walls
- Have a pulse
- Deep under the skin
- Have no valves
- Veins
- Carry blood to the heart.
- Have thin walls
- Do not have a pulse
- Near surface of the skin
- Have valves to stop back-flow of blood
- Capillaries
- Connect arteries and veins
- Very thin walled1 cell thick
16Circulation
Right Atrium
Right Ventricle
Body
Lungs
Left Ventricle
Left Atrium
17Circulation
18Circulation
19Lungs
- Each human has two lungs
- Between 10 and 12 inches long
20Functions of Lungs
- Respiration
- process of oxygen from incoming air entering the
blood, and carbon dioxide, a waste gas from the
metabolism of food leaving the blood
21Respiration
- Breath in air that is has oxygen (O2)inspiration
- O2 travels down trachea, through the bronchi and
bronchioles, into the alveoli for gas exchange - Blood comes from heart and goes to the lungs to
get oxygenated - Exchange carbon dioxide (CO2) (from body) for new
O2 by diffusion - CO2 is breathed outexpiration
22Digestion
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24Mouth Esophagus
- Food first enters the mouth and then moves down
the esophagus in to the stomach. - The esophagus is made up of muscle and moves food
downward by itself, without you controlling it. - Saliva helps to moisten food and break down
carbohydrates.
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26Stomach
- It is a large muscular sack that receives chewed
up food. - The stomach mixes the food you ate and begins to
break down the proteins. - Once the food is mixed with stomach juices it is
called chyme. - When mixed thoroughly, the chyme is squirted into
the Small Intestine.
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28Pancreas Liver
- Both organs make chemicals that break down
carbohydrates, proteins, and fats in the chyme. - They squirt these chemicals into the first part
of the Small Intestine called, the Duodenum.
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30Small Intestine
- This is where the broken down nutrients (carbs,
fats, and proteins) are absorbed into the
bloodstream. - The blood carries these nutrients to all parts of
the body, where they are used for energy. - It takes 2-4 hours for the chyme to travel
through the Small Intestine.
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32Large Intestine
- After the nutrients have been absorbed from the
chyme, it moves into the large intestine. - Here water is absorbed from the chyme back into
the body. - This is where the chyme becomes fecal material.
- The fecal material is stored here until you are
ready to defecate.
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34Kidneys
- Control how much water is in your body.
- When you are dehydrated they keep more water in
your blood. - When you drink a large amount of liquid, they let
you get rid of the extra water in the form of
Urine.
35References
- www.teachnet.ie/ farmnet/Circulatory.htm
- www.digbysystems.com/ emtlist/
- http//www.talktransplant.co.uk/images/Heart/circu
latory_system.gif - www.aduk.org.uk/ lungs_diagram.php
- www.bized.ac.uk/current/ leisure/2004_5/221104.htm
- http//kidshealth.org/teen/your_body/body_basics/l
ungs.html