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Embriología

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20 Terms

1

Embriología

Deriva del intestino medio: ciego, apéndice, colon ascendente y de un medio a 2/3 el colon transverso

derivan del intestino posterior: colon transverso, colon descendente,colon sigmoideo, recto y conducto anal

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2

primordio del ciego y apéndice

aparece en 6xta semana

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3

Las capas de la pared del conducto anal proceden del

mesénquima esplácnico

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4

Rasgos distintivos del colon

tenias del colon

haustras colónicas

apéndice omentales

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5

Mucosa

superficie lisa sin pliegues ni vellosidades

contiene abundantes glándulas intestinales (criptal lieberkühn)

tienen epitelio cilíndrico simple

se reabsorbe agua y electrolitos

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6

Lamina propia

meseta colágena

vaina fibroblástica

GALT

vasos linfáticos

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7

Muscular externa

condensada en bandas musculares longitudinales prominentes

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8

Submucosa y serosa

adventicia si es que está en contacto con otras estructuras

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9

ciego y apéndice

la apéndice tiene una capa uniforme de músculo longitudinal en la muscular externa y una gran cantidad de nódulos linfáticos.

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10

Recto y conducto anal

el recto es la porción distal del tubo digestivo.

se divide en 3 zonas:

  • zona colorrectal

  • zona de transición

  • zona escamosa

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11

Anatomía

Mide 1metro y medio de largo

la primera parte se llama ciego

continua absorbiendo agua y nutrientes minerales de los alimentos y sirve como area de almacenamiento de las heces.

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12

colon ascendente

del ciego asciende verticalmente hacia la cara inferior del higado

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13

colon transverso

angulo colico derecho y se dirige hacia la izquierda hasta el polo inferior del bazo

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14

colon descendente

angulo colico izquierdo y desciende hasta la cresta iliaca izquierda

mide 1.5 m

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15

vasos y nervios del ciego y apendice

  • arteria apendicular

  • vena apendicular

  • ganglios cecales anteriores y posteriores

  • nervios del plexo solar

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16

arterias del colon

arterias colicas derechas: provienen de la mesenterica superior

arterias colicas izquierdas: mesenterica inferior

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17

nervios del colon

plexo solar

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18

recto

va de S3 al ano

mide 14cm en hombre y 12cm en mujer

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19

vasos y nervios del recto

arterias:

  • hemorroidales superiores

  • hemorroidales medias

venas: plexo hemorroidal

nervios: plexo lumboaórtico

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20

ano arterias

hemorroidales inferiores

nervios del plexo sacro

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