Presentation on theme: "Respiratory and Circulatory Systems"— Presentation transcript:
1Respiratory and Circulatory Systems Air and Blood
2Why do animals need air?? C6H12O6 + 6O2 6CO2+ 6H2O+36ATP Need oxygen in the air for…CELLULAR RESPIRATION!!!C6H12O6 + 6O2 6CO2+ 6H2O+36ATPRemember? Occurs in the mitochondria.W/out ATP cells cannot make stuff!
3Respiratory Organs Used to get O2 Lower animals: through membranes, pores, or skinSome animals have gills.Some insects have tracheae.Chordates have lungs!
14How 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!!!!
15Functions 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.
16Functions continued. Larger organisms cannot rely on diffusion. ie) earthworms & all vertebratesSome body substances made in one area may be needed in another etc.ThereforeThey need a transportation system.Kind of like a big city uses streets, highways, & rail lines.
17Closed 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!!!
18There was a reason the Tin Man wanted a heart! The HeartThere was a reason the Tin Man wanted a heart!This incredible pumpallows all of the blood tobe squirted to all of yourbody parts.
20Step by Step… All of the veins come & empty into : #1 Right AtriumBlood then flows into:# 2 Right VentricleRight Ventricle sends this O2 poor blood to the lungs to exchange gases. Then the blood returns to:# 3 Left AtriumBlood then flows to the:# 4 Left Ventricle
21Continued. . .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: heartto the lungs; from lungsheart; & then heartout to your body.