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Respiratory and Circulatory Systems Air and Blood.

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Presentation on theme: "Respiratory and Circulatory Systems Air and Blood."— Presentation transcript:

1 Respiratory and Circulatory Systems Air and Blood

2 Why do animals need air?? Need oxygen in the air for… CELLULAR RESPIRATION!!! C 6 H 12 O 6 + 6O 2 6CO 2 + 6H 2 O+36ATP Remember? Occurs in the mitochondria. W/out ATP cells cannot make stuff!

3 Respiratory Organs Used to get O 2 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 O 2 rich blood to the rest of our body?

13 The Amazing Circulatory System!

14 How is this O 2 Blood Circulated? Each breath gives brings air to our respiratory system. This O 2 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. O 2, 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 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 O 2 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 & O 2 they need to stay alive!

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