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Gas exchange

Gas exchange. Trachea System. Found in insects. Trachea System. Found in insects Hollow tubes throughout the body supplying oxygen – trachea. Trachea System. Found in insects Hollow tubes throughout the body supplying oxygen – trachea

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Gas exchange

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  1. Gas exchange

  2. Trachea System • Found in insects

  3. Trachea System • Found in insects • Hollow tubes throughout the body supplying oxygen – trachea

  4. Trachea System • Found in insects • Hollow tubes throughout the body supplying oxygen – trachea • Open to the outside through holes called spiracles in the exoskeleton

  5. Trachea System • Found in insects • Hollow tubes throughout the body supplying oxygen – trachea • Open to the outside through holes called spiracles in the exoskeleton • Trachea are kept open by circular bands of chitin – they lead to smaller tubes without chitin bands called tracheoles

  6. Trachea System • Found in insects • Hollow tubes throughout the body supplying oxygen – trachea • Open to the outside through holes called spiracles in the exoskeleton • Trachea are kept open by circular bands of chitin – they lead to smaller tubes without chitin bands called tracheoles • Tracheoles end in a moist ‘skin’ that reaches every cell so oxygen can now diffuse into the cells.

  7. Trachea System • Found in insects • Hollow tubes throughout the body supplying oxygen – trachea • Open to the outside through holes called spiracles in the exoskeleton • Trachea are kept open by circular bands of chitin – they lead to smaller tubes without chitin bands called tracheoles • Tracheoles end in a moist ‘skin’ that reaches every cell so oxygen can now diffuse into the cells. • Some insects can ‘pump’ their body to assist in the gas exchange – like a very simple form of breathing.

  8. Trachea System • Found in insects • Hollow tubes throughout the body supplying oxygen – trachea • Open to the outside through holes called spiracles in the exoskeleton • Trachea are kept open by circular bands of chitin – they lead to smaller tubes without chitin bands called tracheoles • Tracheoles end in a moist ‘skin’ that reaches every cell so oxygen can now diffuse into the cells. • Some insects can ‘pump’ their body to assist in the gas exchange – like a very simple form of breathing. • Insects blood is clear because it doesn’t carry gases

  9. Trachea System • Found in insects • Hollow tubes throughout the body supplying oxygen – trachea • Open to the outside through holes called spiracles in the exoskeleton • Trachea are kept open by circular bands of chitin – they lead to smaller tubes without chitin bands called tracheoles • Tracheoles end in a moist ‘skin’ that reaches every cell so oxygen can now diffuse into the cells. • Some insects can ‘pump’ their body to assist in the gas exchange – like a very simple form of breathing. • Insects blood is clear because it doesn’t carry gases • This type of gas exchange system has kept insects small.

  10. Handy information to read • http://www.youtube.com/watch?v=CVP_PY0ZsOI • http://www.youtube.com/watch?v=fL0JwCD4mKI

  11. To watch • http://www.youtube.com/watch?v=aPF00PzUGzc

  12. Gas exchange in Fish • Gills – external to the body, constantly bathed in water

  13. Gas exchange in Fish • Gills – external to the body, constantly bathed in water • Made of thin filaments supported by bony structures – each filament is composed of delicate plates containing many capillaries so look dark red.

  14. Gas exchange in Fish • Gills – external to the body, constantly bathed in water • Made of thin filaments supported by bony structures – each filament is composed of delicate plates containing many capillaries so look dark red. • In bony fish, the gills are protected by a covering called the operculum

  15. Gas exchange in Fish • Gills – external to the body, constantly bathed in water • Made of thin filaments supported by bony structures – each filament is composed of delicate plates containing many capillaries so look dark red. • In bony fish, the gills are protected by a covering called the operculum • In cartilaginous fish (sharks) – gills are open to the water as slits down the side of the body.

  16. Gas exchange in Fish • Gills – external to the body, constantly bathed in water • Made of thin filaments supported by bony structures – each filament is composed of delicate plates containing many capillaries so look dark red. • In bony fish, the gills are protected by a covering called the operculum • In cartilaginous fish (sharks) – gills are open to the water as slits down the side of the body. • Fish continuously pump water through the mouth and over the gills to exit at the back of the operculum.

  17. Gas exchange in Fish • Gills – external to the body, constantly bathed in water • Made of thin filaments supported by bony structures – each filament is composed of delicate plates containing many capillaries so look dark red. • In bony fish, the gills are protected by a covering called the operculum • In cartilaginous fish (sharks) – gills are open to the water as slits down the side of the body. • Fish continuously pump water through the mouth and over the gills to exit at the back of the operculum. • Sharks have to keep in constant motion to maintain a flow of water

  18. Gas exchange in fish • This process is called ventilation – any method that increases the flow of the respiratory medium (either water or air) over the respiratory membranes.

  19. Gas exchange in fish • This process is called ventilation – any method that increases the flow of the respiratory medium (either water or air) over the respiratory membranes. • The capillaries in the gills are set up so gas can be diffuses easier – the blood flow is opposite to the water flow.

  20. Gas exchange in fish • This process is called ventilation – any method that increases the flow of the respiratory medium (either water or air) over the respiratory membranes. • The capillaries in the gills are set up so gas can be diffuses easier – the blood flow is opposite to the water flow. • This means that the blood coming into the capillary meets new water full of oxygen – this is counter-current exchange.

  21. Gas exchange in fish • This process is called ventilation – any method that increases the flow of the respiratory medium (either water or air) over the respiratory membranes. • The capillaries in the gills are set up so gas can be diffuses easier – the blood flow is opposite to the water flow. • This means that the blood coming into the capillary meets new water full of oxygen – this is counter-current exchange. • It makes the oxygen take-up so efficient, a fish can get 80% of the oxygen out of the water.

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