Anime is not really targeted for younger audiences because I went to Japan once and saw a bunch of high school students watching Full Metal Alchemist.
Some anime like One Piece, Naruto, Attack On Titan, and Bleach etc. have violence and some blood.
For reasons, sometimes the animation studio have to censor some blood out because there are some (I SAID SOME) people who are not comfortable seeing lots of blood and gore not because their too young, but it's just their preference.
But really, Anime is not only for kids, I still watch it because TV Shows here in America are just too boring to watch (Besides The Walking Dead, Tosh.0 and Game Of Thrones)