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Histologia

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Apuntes primer semestre histologia, medicina usc

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Uploaded on
January 7, 2025
Number of pages
9
Written in
2024/2025
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Class notes
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Lina magali
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Secretar sustancias el medio interno. Epitelios glandulares endocrinos
Exterior. Epitelios gladulares exocrinos
-sus celulas estan bien organizadas y polarizadas, las celulas que
contactan con la matriz extracelular estan separas por la lamina basal,
el polo que descana sobre la lamina basal se denomida polo basal y el
opuesto, polo apical




Paarenquima: componentes epteliales secretores
Estroma: formado por tehidp conectivo, se observan vasos sanguineos en
sus senos, componentes del sistema linfatico y elementos del sistema
nervioso periferico. Da soporte mecanico y trofico al epitelio.
Parenquima.



TIPOS DE TEJIDOS GLANDULARES


Exocrina: conjunto de celulas que han
adquirido una caoacidad secretora y lo
liberan a una luz
Endocrina: conj de celulas epiteliales
pero estas celulas no liberan
secreciones, lo liberan a los vasos
sanguineos o altejido conectivo por
difusion para llegar a las demas celulas

, Se originan de un epitelio de revestimmiento
1. Las celulasque se dieferencian empiezan a proliferar
y comienzan a meterse al tejido conectivo,
2. Comienzan a especializarse en la secrecion de
sustancias. O en la conduccion o secretar o ambas
3. La porcion que unne la porcion secretora con la luz,
comiezaz a degenerarse, obtengoun cumulo de celulas
que secretan sustancias y qeu para que puedan
serliberadas y transmitidas, tienne que serllevadas por
vasos sanguineos o tejidos conectivos




-Unicelular: Gl caliciforme, con citoplasma
blanco, secrecion de tipo mucosa es
eliminada. Forma de copa y su mecanismo
de secrecion es merocrino

-Multicelular nombre de la glandula
Ej: Gl intestinal
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