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.
In this case, seasonal vitamin D supplementation would be beneficial. The most common vitamin and mineral deficiencies, especially for vegetarians and vegans, are in iron, calcium, vitamin D and B12. Vegan sources of calcium include leafy green vegetables (like spinach and kale), almonds and sesame seeds. Many milk and yogurt alternatives are also calcium-fortified.