Gastrointenstinal system

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Presentation transcript:

Gastrointenstinal system

Endodermal origin – mucosis Splanchnic mesoderm – other layers Development of primitive gut liver pankreas Adventicie

Jícen = Esophagus Cubic + sqamous non- cornified epithelia, longitudinal folds Mucin glands Muscle - upper 2/3 striated muscle and lower 1/3 smooth muscle (try to find) Connective tissue on the surface PAS (Periodic acid–Schiff) - Stains mucin dark pink

Muscle Bazal lamina Cubic epithelia Squamous epithelia Lamina propria (Submucosis) Vessel Magn. x40 Adult

Embryonic esophagus E2111/5 8th week iud Magn. x5 Mucosis Adventicia Submucosis Muscle

Stomach = Žaludek Cylindric epithelia Plenty mucin and serous glands žlázky Epihtelia Lamina propria Muscle Magn. x5

Magn. x40 6th week iud stomach Embryo Mucosis Lamina propria Muscle Adventicia

Mucosis of villi Muscularis Mucosae Mucosis of crypt Lamina propria Muscle Adult Magn. x5 Cylindric epithelia Enterocytes, undifferentiated cells, goblet cells, paneth´s cells, endocrinne cells Small Intestine = Tenké střevo

Magn. x5 11th week of iud Mucosis Adventicia Muscle Submucosis Crypt Villi Embryo Proliferation of mucosis of primitive gut is followed by recanalisation

Lieberkuhn´s crypts Lamina propria Vessel Muscularis mucosae Submucosis Magn. x5 Large intestine = Tlusté střevo Adult Cylindric epithelia – short folds goblet cells

10,5th week iud Magn. x5 Embryo Mucosis Lamina Propria Muscle Adventicia