Using a customer supplied envelope, an individual can mail a Priority Mail Express letter envelope weighing one ounce up to sixteen ounces for $31.20 plus the extra fee of $12.50 to add Sunday/Holiday Delivery.
muscle cell-an elongated contractile cell that forms the muscles of the body. muscle fiber, muscle fibre. fibre, fiber-any of several elongated, threadlike cells (especially a muscle fiber or a nerve fiber).
Muscle fibres are the individual contractile units within muscle. A single muscle such as the biceps contains many muscle fibres. Another group of cells, the myosatellite cells are found between the basement membrane and the sarcolemma of muscle fibers.