1 Each muscle fibre ( muscle cell ) is covered by a plasma membrane sheath which is called the sarcolemma. 2  Tunnel-like extensions from the sarcolemma pass through the muscle fibre from one side of it to the other in transverse sections through the diameter of the fibre.keletal muscles consist of 100,000s of muscle cells (also known as muscle fibers) that perform the functions of the specific muscle of which they are a part.
Another leafy vegetable high in beta carotene in the form of vitamin A, kale has 478 milligrams of the nutrient and 20 calories per half cup serving. Kale recipes to try: â¢ Kale Chips. â¢ Roast Cod with Bacon, Potatoes, and Kale. â¢ Kale Salad with Glazed Onions and Cheddar.
Vitamin A, also called retinol, is essential for eye and skin health. Vitamin A is an antioxidant, helping your body fight free radicals that can cause tissue and cell damage. Vitamin A is found in vegetables and fruits such as carrots, broccoli, kale, pumpkin, sweet potatoes, cantaloupe and red peppers. vitamins, such as folate, niacin, riboflavin and thiamin, reduce heart disease and stroke, ease stress, alleviate depression, help the nervous system and help break down carbohydrates. B Vitamins can be found in bananas, lentils, chili peppers, dark leafy vegetables, berries and beans. email.