1. Respiratory and Circulatory Systems
Air and Blood

2. Why do animals need air?? C6H12O6 + 6O2  6CO2+ 6H2O+36ATP
Need oxygen in the air for…
CELLULAR RESPIRATION!!!
C6H12O6 + 6O2  6CO2+ 6H2O+36ATP
Remember? Occurs in the mitochondria.
W/out ATP cells cannot make stuff!

3. Respiratory Organs Used to get O2
Lower animals: through membranes, pores, or skin
Some animals have gills.
Some insects have tracheae.
Chordates have lungs!

4. How Gills Work…

5. How Lungs Work…
Lungs work just like the puffer thing works to blow air onto the fire!

6. How Lungs Work…

7. Breathing…
Air enters the mouth or nasal cavity, goes into the trachea (wind pipe), is carried to the bronchial tubes, and then into the air sacs called the alveoli!

8. In the Alveoli…
Oxygen in the air reaches the alveoli and goes through the thin membrane into the blood as carbon dioxide is released from the blood back into the alveoli to be exhaled…

9. How the Lungs Work:
Click image to view movie.

10. Why should you take care of your lungs?

11. The Whole Point of Human Respiratory System .
Very simple:
Basic function is bring
about the exchange of Oxygen & Carbon Dioxide between the blood, the air, and tissues.

12. OK. So Now We Have Oxygen.
How do we get this O2 rich blood to the rest of our body?

13. The Amazing Circulatory System!

14. How is this O2 Blood Circulated?
Each breath gives brings air to our respiratory system.
This O2 is needed by trillions of cells.
What delivers this all important element?
THE HEART!!!!

15. Functions of the Circulatory
Organisms composed of small number of cells & some invertebrates (arthropods & mollusk) do not need a circulatory system?
Why?
Because most cells are in direct contact w/ the environment.
O2 , nutrients, & waste products can easily diffuse back & forth across cell membranes.
They use an Open Circulatory System.

16. Functions continued. Larger organisms cannot rely on diffusion.
ie) earthworms & all vertebrates
Some body substances made in one area may be needed in another etc.
Therefore
They need a transportation system.
Kind of like a big city uses streets, highways, & rail lines.

17. Closed Circulatory System.
This transportation system is a CLOSED system.
Circulating fluid called blood is contained w/in a system of vessels.
The human circulatory system consists of the: heart, blood vessels, & the blood!!!

18. There was a reason the Tin Man wanted a heart!
The Heart
There was a reason the Tin Man wanted a heart!
This incredible pump
allows all of the blood to
be squirted to all of your
body parts.

19. The Blood Through The Heart

20. Step by Step… All of the veins come & empty into :
#1 Right Atrium
Blood then flows into:
# 2 Right Ventricle
Right Ventricle sends this O2 poor blood to the lungs to exchange gases. Then the blood returns to:
# 3 Left Atrium
Blood then flows to the:
# 4 Left Ventricle

21. Continued. . .
The Left Ventricle is important because it ultimately pumps blood to all of the body.
Valves are what prevent the blood from flowing back the incorrect way.
Draw a path on your paper: heartto the lungs; from lungsheart; & then heartout to your body.

22. Check your Drawing!!

23. Blood through the Body

24. Moving Blood Along…
Click image to view movie.

25. Interrelationships? So how do these systems work together?
The circulatory & respiratory system supply cells throughout the body w/ the nutrients & O2 they need to stay alive!