Cardiac muscle (heart muscle). This type of muscle is found solely in the walls of the heart. It has similarities with skeletal muscles in that it is striated and with smooth muscles in that its contractions are not under conscious control. However this type of muscle is highly specialised.t has similarities with skeletal muscles in that it is striated and with smooth muscles in that its contractions are not under conscious control. However this type of muscle is highly specialised.
There are few natural sources of vitamin D. For that reason, most of the vitamin D in your diet comes from fortified foods, such as dairy products and alternatives, breakfast cereals, juices and margarine.
Few foods contain vitamin D naturally. Fortunately, the body can make vitamin D with a little help from the sun. Foods containing vitamin D include vitamin D fortified milk, fortified breakfast cereals, egg yolks, fatty fish and liver. Calcium is one of the most abundant minerals in the body.