Células eucariotas y procariotas

https://www.youtube.com/watch?v=JFeTBoY-QSc https://www.youtube.com/watch?v=4T3N45__aHs https://www.youtube.com/watch?v=WQgwaigJlsI REPASO DEL DIGESTIVO,CIRCULATORIO Y RESPIRATORIO https://www.youtube.com/watch?v=S3jJj68dBxw