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 sensory organs developed around the mouth in an attempt to help the creature eat-that being the primary reason for senses. Because all the sensory organs were concentrated around the mouth that was the beginnings of the head. So you see-the concentration of sensory organs was the reason for the head.There was no head to begin with.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.