Get an AnswerConnective tissue sacs lined with synovial membranes that act as cushionsSmart Writing ServicesOctober 25, 2017 12:35 pmOctober 25, 2017Previous ArticleSaddle joints have concave and convex surfaces. Identify the saddle joint of the skeleton.Next ArticleDelaware County CC BIO 151 On a hike, you expend 350kcal per hour.