You'll find 4 basic classifications of joint actions. Based on their spot, joints can both: Joints, comprised of bones and connective tissue, derive from embryonic mesenchyme. Bones develop right through intramembranous ossification or indirectly by way of endochondral ossification. Mesenchymal cells straight differentiate into bone-manufacturing cells throughout intramembranous ossif... https://www.amazon.com/dp/B082XJ4R2F