Human head Human head In human anatomy, the head is at the top of the human body. It supports the face and is maintained by the skull, which itself encloses the brain. The human head consists of a fleshy outer portion, which surrounds the bony skull. The brain is enclosed within the skull. The head rests on the neck, and the seven cervical vertebrae support it. The human head typically weighs between The face is the anterior part of the head, containing the eyes, nose, and mouth. On either side of the mouth, the cheeks provide a fleshy border to the oral
Segmentation in the human nervous system that binds cytotactin in the posterior sclerotome of the somites. These molecules exert their strong influence on the segmentation pattern by restricting the outgrowth from the region. As a matter of fact, these inhibitory chemicals expressed in the posterior sclerotome forms the basis of the segmentation pattern observed in the vertebrate nervous system. In short, the segmental arrangement of the peripheral nervous system (PNS) seen in vertebrates derives from the division of the sclerotomes into anterior and posterior parts. Segmentation in the human nervous system Segmentation is the physical characteristic by which the human body is divided into repeating subunits