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).
Muscles are a type of tissue composed of contractile cells or fibers that effect MOVEMENT of a part of the human body. Its outstanding characteristics are the ability to shorten or contract and possess the properties of irritability, conductivity, and elasticity.he primary function of muscle cells is to allow movement of the  different parts of the body. One important internal organ that is  controlled by muscle cells is the pumpin â¦ g of the heart. 3 people found this useful. Mrsorientelorenzo.