dixestivo e respiratorio
TRANSCRIPT
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APARATOS PARA A NUTRICIÓN (I)DIXESTIVO E RESPIRATORIO
Bioloxía e Xeoloxía 3º ESO
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Os procesos e aparatos da nutrición
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-Transforma os alimentos en nutrientes (dixestión)-Absorbe eses nutrientes-Elimina restos non dixeridos
O aparato dixestivo
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Componentes do aparato dixestivo
Tubo dixestiv
o
Boca
Farinxe
Esófago
Estómago
Intestino
Delgado
GrosoAno
Glándulas
anexas
Glándulas
salivaisFígado
Páncreas
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O aparato dixestivo
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As capas do tubo dixestivo
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A cavidade bucal
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Os dentes
Fórmulas dentarias: - Adulto: 2123 - Leite: 2120
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Estructura dos dentes
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A farinxe
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O esófago
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O estómago
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O intestino delgado
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O intestino groso
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As glándulas anexas As glándulas salivais
Composición da saliva
Auga (95%)Ións cloruroBicarbonatoMocoLisozimaPtialinaInmunoglobulinasCalcio
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As glándulas anexas O fígado (e a vesícula biliar)
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As glándulas anexas O páncreas
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Os procesos da dixestión
INXESTIÓN
DIXESTIÓN
DIXESTIÓN
MECÁNICA
DIXESTIÓN
QUÍMICAABSORCI
ÓNEXESTIÓN
OU DEFECACIÓ
N
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A dixestión mecánica Mastigación Dentes e mandíbula
inferior Insalivación Língua e glándulas
salivais Deglución Movementos
peristálticos
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A dixestión química Na boca Dixestión de glícidos complexos (amidón) en glícidos simples (Bolo alimenticio)
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A dixestión química
No estómago Dixestión de proteínas en fragmentos máis pequenos (Quimo)
PEPSINA
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A dixestión química No intestino delgado (duodeno) (Quilo)
PEPTIDASA
Dixestión dos fragmentos de proteína en aminoácidos
Dixestión dos glícidos simples en glicosa
AMILASA PANCREÁTI
CA
Dixestión das graxas
LIPASA
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A dixestión química (resumo)
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Absorción intestinal
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Exestión ou defecaciónVideo resumo
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-Intercambio de gases co exterior-Toma O2 do aire-Expulsa CO2 ó medio
O aparato respiratorio
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Por que é necesario o intercambio de gases co exterior?
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Componentes do aparato respiratorio
Vías respiratorias
Fosas nasais
Farinxe
Larinxe
Tráquea
Bronquios
Bronquiolos
Pulmóns
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Aparato respiratorio
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A cavidade nasal
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A farinxe
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A larinxe
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As cordas vocais
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A tráquea
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Os bronquios e os bronquiolos
Bronquiolos terminales
Bronquiolos
Bronquios terciarios
Bronquios secundarios
Bronquios primarios
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Os pulmóns
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Os pulmóns
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A respiraciónAnimación 1Animación 2
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O intercambio de gases