Get an AnswerConnective tissue sacs lined with synovial membranes that act as cushionsSmart Writing ServicesOctober 25, 2017 9:26 amOctober 25, 2017Previous ArticleSaddle joints have concave and convex surfaces. Identify the saddle joint of the skeleton.Next ArticleThe ______________ of the shoulder joint functions to deepen the cavity of the glenoid fossa.