What are joints and bones?

Bones not only provide shape to our bodies and protection for our organs but also produce red and white blood cells, act as a store for minerals like calcium and phosphorus, and help regulate blood acidity.^[1] Joints are simply the spaces where bones meet. Some joints allow for a movement, such as knee joints, whereas others don’t, such as the joints between skull bones. The most common type of joint in the body — and the one that probably most easily comes to mind — are synovial joints, which are surrounded by a fluid-filled cavity and also contain cartilage to help with smooth movement.^[1]