Bai 16 tieu hoa dong vat giao an thi gvdg vong 1
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Transcript of Bai 16 tieu hoa dong vat giao an thi gvdg vong 1
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Gi¸o viªn : Bïi Duy Th¾ng
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KiÓm tra bµi cò
- Tr×nh bµy sù kh¸c nhau gi÷a tiªu ho¸ néi bµo vµ tiªu ho¸ ngo¹i bµo? Gi¶i thÝch sù kh¸c nhau ®ã.
- Sù tiÕn ho¸ cña hÖ tiªu ho¸ thÓ hiÖn nh thÕ nµo qua c¸c líp ®éng vËt?
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TiÕt 16
Tiªu ho¸ ë ®éng vËt (tt)
V. ®Æc ®iÓm tiªu ho¸ ë thó ¨n thÞt vµ thó ¨n thùc vËt
1. §Æc ®iÓm tiªu ho¸ ë thó ¨n thÞt2. §Æc ®iÓm tiªu ho¸ ë thó ¨n thùc vËt
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H ¬u cao cæ
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Thá
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Nai
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S tö
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Hæ
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Néi dung
Thó ¨n thÞt
Thó ¨n thùc vËt
Bé r¨ng
D¹ dµy
Ruét nonManh trµng
??
?
?
?
??
?
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Tiªu ho¸ ë thó ¨n thùc vËtTiªu ho¸ ë thó ¨n thùc vËt
Tiªu ho¸ ë thó ¨n thÞt
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Néi dung
Thó ¨n thÞt Thó ¨n thùc vËt
Bé r¨ng
- R¨ng nanh s¾c nhän vµ dµi ®Ó c¾m gi÷ con måi.
- R¨ng cöa s¾c ®Ó t¸ch thÞt.
- R¨ng tr íc hµm vµ r¨ng ¨n thÞt lín, c¾t thÞt thµnh nh÷ng miÕng nhá dÔ nuèt.
- R¨ng hµm cã khÝch th íc nhá , Ýt sö dông.
- R¨ng nanh vµ r¨ng cöa Ýt nhän vµ gièng nhau.- R¨ng hµm vµ r¨ng tr íc hµm ph¸t ntriÓn vµ cã t¸c ndông nghiÒn n¸t cá khi nhai.
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Néi dung
Thó ¨n thÞt Thó ¨n thùc vËt
D¹ dµy
-ThÞt ® îc tiªu ho¸ c¬ häc vµ ho¸ häc b»ng c¸ch co bãp vµ tiÕt dÞch vÞ trén nhuyÔn thøc ¨n, enzim pepsin thuû ph©n pr«tªin.
-D¹ dµy ®¬n: 1 tói lín .
- D¹ dµy ®¬n ë thá vµ ngùa.-D¹ dµy 4 tói ( ë tr©u, bß...): D¹ cá d¹ tæ ong , d¹ l¸ s¸ch vµ d¹ mói khÕ. + D¹ cá: L u gi÷ thøc »n vµ lªn men tiªu ho¸ xenlul« vµ c¸c chÊt dinh d ìng kh¸c nhê VSV. + D¹ tæ ong: § a thøc ¨n lªn miÖng dÓ nhai l¹i
+ D¹ l¸ s¸ch: HÊp thô n íc.
+ D¹ mói khÕ: TiÕt pepsin vµ HCl tiªu ho¸ pr«tªin trong cá vµ VSV tõ d¹ cá xuèng.
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Néi dung
Thó ¨n thÞt Thó ¨n thùc vËt
Ruét non
- Ruét non t ¬ng ®èi ng¾n so víi ruét non cña thó ¨n thùc vËt.- C¸c chÊt dinh d ìng ® îc tiªu ho¸ b»ng c¬ häc vµ ho¸ häc.
- Ruét non dµi h¬n so víi ruét non cña thó ¨n thÞt.
- C¸c chÊt dinh d ìng ® îc tiªu ho¸ b»ng c¬ häc vµ ho¸ häc.
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HÖ tiªu ho¸ cña thá
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Néi dung
Thó ¨n thÞt Thó ¨n thùc vËt
Manh trµng
- Kh«ng ph¸t triÓn vµ kh«ng cã chøc n¨ng tiªu ho¸.
- Manh trµng rÊt ph¸t triÓn vµ cã nhiÒu VSV céng sinh tiÕp tôc tiªu ho¸ xelul«z¬ vµ c¸c chÊt d ìng cã trong tÕ bµo thùc vËt.- C¸c chÊt dinh d ìng ®¬n gi¶n ® îc hÊp thô qua manh trµng.
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KiÓm tra ®¸nh gi¸C©u1:Trong èng tiªu ho¸ cña ®éng vËt nhai l¹i,thµnh xenlul«z¬ cña tÕ bµo thùc vËt:
A. kh«ng ® îc tiªu hãa nh ng ® îc ph¸ vì nhê co bãp cña d¹ dµy.
B. ® îc n íc bät thuû ph©n thµnh c¸c chÊt ®¬n gi¶n. C. ® îc tiªu ho¸ nhê vi sinh vËt céng sinh trong manh trµng vµ d¹ dµy cá.
D. ® îc tiªu ho¸ ho¸ häc nhê c¸c enzim tiÕt tõ èng tiªu ho¸.
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Pr«tªin trong thøc ¨n
Ho¹t ®éng cña vi khuÈn d¹ cá
Pr«tªin vi khÈn
Tiªu ho¸ trong d¹ mói khÕ
Urªaza
Am«ni¨c
TuyÕn n íc bät
Gan: T¹o urª
C¸c axit amin
HÊp thô vµo c¬ thÓ