Caracteristicas que diferencian a los reptiles de los anfibios

1. Los reptiles tienen una piel dura y seca y escamosa que les ofrece proteccion contra la desecacion y daños fisicos. La piel consta de una delgada epidermis, que se muda periodicamente y una dermis bien desarrollada y mucho mas gruesa. La dermis esta provista de cromotaforos, las celulas portadoras de pigmentos que proporcionan a muchos lagartos y serpientes sus llamativos colores. Las escamas caracteristicas de los reptiles estan formadas por queratina. Derivan fundamentalmente de la epidermis y por lo tanto no son homologas de las escamas de los peces, que son estructuras oseas y dermicas. En algunos reptiles, tales como los caimanes las escamas permanecen a lo largo de toda su vida, creciendo gradualmente para reemplazar el desgaste. En otros como las serpientes y los lagartos crecen nuevas escamas bajo las antiguas que son entonces mudadas en intervalos.

2. El huevo de los reptiles contienen alimento y membranas protectoras que permiten el desarrollo embrionario en tierra seca. A diferencia los huevos de los anfibios tienen una cobertura gelatinosa y deben ser protegidos de la desecacion.

3. Los reptiles tienen algun tipo de organo copulador, que permite la fecundacion interna, que es un requisito para un huevo con cascara ya que el esperma debe alcanzar al huevo antes de que este sea protegido. El esperma de los testiculos es transportado por los vasos deferentes hasta el organo copulador, que es una evaginacion de la pared de la  cloaca. El sistema femenino consta de un par de ovarios y unos oviductos, las paredes glandulares de los oviductos segregan la albumina y la cascara para los huevos.

4. Los reptiles tienen un sistema circulatoro mas efectivo y una presion sanguinea mas alta que los anfibios. En todos los reptiles, la auricula derecha que recibe la sangre oxigenada del cuerpo, esta separa de la auricula izquierda que recibe sangre oxigenada de los pulmones.

5. Los pulmones de los reptiles estan mejor desarrollados que el de los anfibios. Los reptiles dependen casi exclusivamente de los pulmones para el intercambio gaseoso, suplementados por una parcial respiracion mucosa – faringea como en las tortugas. La respiracion cutanea que es importante en los anfibios, ha sido completamente desechada por los reptiles.

6. Los riñones de los reptiles son de un tipo metanefrico avanzado, con sus propios conductos (ureteres) de comunicacion con el exterior. Los riñones son muy eficientes en la produccion de pequeños volumenes de orina y conservando el agua como resultado la orina de muchos reptiles es una pasta semisolida.

7. Todos los reptiles, excepto las formas apodas, tienen mejor desarrollado su soporte corporal que los anfibios y unas extremidades mas eficientemente diseñadas para desplazamiento sobre tierra.

8. Su sistema nervioso de los reptiles es mas avanzado que el del anfibio. Aunque el encefalo es pequeño, el cerebro ha aumentado de tamaño en relacion con el resto del encefalo. Los organos de los sentidos estan bien desarrollados, con excepcion del oido.

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38 Responses to “Caracteristicas que diferencian a los reptiles de los anfibios”

  1. Hola. Muy bueno el post- Yo por mi parte los invito a que vean esta presentación sobre los reptiles.

    http://ppts-interesantes.blogspot.com/2008/12/los-reptiles.html

  2. hola puxa me gustaria que hubiera unas pocas diferencias entre los cocodrilos y los anfibios

  3. Hola que buen post explicativo yo tambien ando aciendo un web aficionado sobre reptiles. Ahorita les animo a ver una galeria de reptiles y anfibios de españa que ya ay mas de 1200 fotos y esa rebuena para podes identificarlos http://tuatera.com/foro/index.php?action=media;sa=album;in=14

  4. hola me gustan los reptiles osea me encanta son re lindos respiran mediantes branqieas y son oviparos. jajaja lo re se a los reptiles.grasias a los maestros qe lo se todo eso y mas .

  5. feoooo!!!!!!!!!!!!!!!

  6. graxias me sirbio para engañar a mi mama kk se diera cuenta “de kk si hice la tarea” gracias

  7. jajajajjaja

  8. muy bueno esta opcion se los agradesco me sirvio mucho para la tarea que tenia los amo y sigan poniendo cosas asi , osea asi de buenas

  9. muy bueno esta opcion se los agradesco me sirvio mucho para la tarea que tenia los amo y sigan poniendo cosas asi de buenas

  10. me ayudaron con la tarea gracia

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