The plasma membrane of the muscle cell is called the sarcolemma.
The cytoplasm of the cell is called sarcoplasm. The sarcoplasm contains several chemical that optimizes the cell for the creation of metabolic energy.
The cell is jam packed with protein containing rod like organelles known as myofibrils.
The myofibrils are made up of organized proteins that interact with one another to cause muscle contraction. These proteins are collectively known as myofilaments and are responsible for the characteristic striated appearance of skeletal muscle.
Each myofibril is loosely surrounded by a series of tubules known as the sarcoplasmic reticulum. This structure is responsible for the cellular transport and storage of chemical, intracellular calcium in particular.
At regular intervals the sarcoplasmic reticulum thickens and changes direction by 90 degreees to form the terminal cisternae.
Transverse tubules are situated in between two terminal cisternae. The orientation of the T-tubules and terminal cisternae is called a Triad. The transverse tubules open to the external extracellular environment via an opening of the sarcolemma, known as the T-tubules openings
Given that muscle contraction is a high metabolic activity the cell is packed with multiple mitochondria. The mitochondrion is an organelle that is the site of cellular respiration that produces the chemical ATP that is used to generate metabolic energy.
The muscle cell has multiple nuclei. Muscle cells are some of the longest cells in the body.
