Synovial joints show a considerable movement. There is a synovial membrane composed of· secretory epithelial cells which secrete thick, sticky synovial fluid. It lubricates joint, provides nutrients and helps to maintain the stability of joint. Gliding joint, hinge joint, pivot joint, ball and socket joint, saddle joint, condyloid joint, all "are types of synovial joints. Su hires forming the cranium are examples· of· fibrous or immovable joints.