I love to watch Anime. I recently watched episodes 1-52 of " Full Moon wo sagashite". But, what i don't understand is when they say that after the episodes there are the "raw" or the"Ova" or in the case of "Mermaid Melody" it's "Pure". Can someone please tell me what these mean and does full moon wo sagashite continue after the 52 episode? And also, What is " Manga" ?

Thanks in Advance