In 1921, Sanger founded the American Birth Control League, which later became the Planned Parenthood Federation of America. In New York City, she organized the first birth control clinic staffed by all-female doctors, as well as a clinic in Harlem with an entirely African-American staff.
Cephalization is considered an evolutionary trend, whereby nervous tissue, over many generations, becomes concentrated toward one end of an organism. This process eventually produces a head region with sensory organs.Cephalization is intrinsically connected with a change in symmetry.It accompanied the move to bilateral symmetry made in flatworms, with ocelli and pinnae placed in the head region.his process eventually produces a head region with sensory organs. Cephalization is intrinsically connected with a change in symmetry. It accompanied the move to bilateral symmetry made in flatworms, with ocelli and pinnae placed in the head region.
The head (and brain) developed because that was where all the sensory organs (and mouth) were. As for an advantage. It might be advantageous to have your sensory organs as high as possible. The reason for this is obvious for sight and sound.Smelling however would benefit more if it were located in the feet.he localization of a brain and specialized sensory organs of an  animal's head is known as cephalization. This presumed evolutionary  process focuses on the creation of sen â¦ sory organs in the anterior  end of the head.