pertukaran gas dlm. manusia 2
DESCRIPTION
gas exchangeTRANSCRIPT
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RESPIRASI MANUSIARESPIRASI MANUSIA
Pernafasan & Paru-ParuPernafasan & Paru-Paru
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Sistem RespirasiSistem Respirasi
Pertukaran gas dlm paru-paru.Pertukaran gas dlm paru-paru. Kita mempunyai sepasang paru-paru di Kita mempunyai sepasang paru-paru di
bahagian atas toraks / dadabahagian atas toraks / dada Di sini, oksigen dan karbon dioksida Di sini, oksigen dan karbon dioksida
ditukar satu dgn lain (exchanged) – ditukar satu dgn lain (exchanged) – oksigen diperlukan utk hidup dan karbon oksigen diperlukan utk hidup dan karbon dioksida dikumuhkan bila hembus nafas.dioksida dikumuhkan bila hembus nafas.
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Bagaimana bernafas?Bagaimana bernafas?
Mulut/hidung Mulut/hidung Trakea Trakea Bronkus Bronkus
Bronkiol Bronkiol Alveoli Alveoli
DarahDarah
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Tarik NafasBila kita tarik nafas…..
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Hembus Nafas
Bila kita hembus nafas….
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Pertukaran GasPertukaran Gas
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Alveoli
Permukaan luar alveoli dijaring banyak kapilari.
Oxygen makes its way into thousands of special air sacs collectively called the ALVEOLI.
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Alveolus
ALVEOLUS – di mana oksigen dipindah ke dlm darah dan karbon dioksida dipindah keluar dari darah.
Jika semua alveoli dileperkan dan diratakan atas lantai, ia akan memenuhi satu gelangang tennis!
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Perbandingan udara pernafasan
Apakah perbezaan antara udara yang ditarik masuk dan dihembus keluar? Bagaimana menguji?
Ada perkara lain…… wap air!
Udara masuk
Nitrogen (78%)Oksigen (20.71%)Karbon dioksida (0.1%)Lain-lain
Udara keluar
Nitrogen (75.5%)Oksigen (14.6%)Karbon dioksida (4%)Lain-lain
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Task 1:Task 1:
With a partner With a partner Partner A – explain the process of breathing Partner A – explain the process of breathing
in and what gases exchangein and what gases exchange Partner B – explain the process of breathing Partner B – explain the process of breathing
out and what gases exchangeout and what gases exchange
Be prepared to share your answers with the Be prepared to share your answers with the class.class.
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Task 2Task 2
Label diagram of lungs and indicate where Label diagram of lungs and indicate where oxygen and carbon dioxide exchange in oxygen and carbon dioxide exchange in the lungs.the lungs.
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TAMAT
Terima Kasih
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