When it comes to our body, everyone knows that muscles are extremely important and that we would not be able to do anything without them. This is because muscles have a vital function in motion, mobility and force generation. There is no surprise, thus, that muscle cells are very complex and complicated. So here is a skeletal muscle cell diagram, for you to understand muscles better.
As you can see in the cell diagram, the skeleton muscle cell has the following components: epimysium, endomysium, fascicle, muscle fiber, blood vessels and perimysium. Besides them, muscle cells also have a cytoplasm, which is not shown in the cell diagram, because it is a part of all living cells. In the skeleton muscle cell, the cytoplasm is called sarcoplasm.
Then, even if there are three types of muscles (skeletal, smooth and cardiac), the skeleton muscle cells are the ones which enhance our mobility, because they move the bones. Muscle fibres, even though are often mistaken with muscle cells, are the basic units of the muscle tissue, so they are the ones which give the muscle the ability to contract. The epimysium is the surrounding connective tissue of every muscle. It also has protective roles, and it is continuous with the fascicle, endomysium and perimysium.
The fascicle, also known as the fascia, is a thin layer which covers the muscles, and it is basically a connective tissue which is situated inside the muscle. The endomysium is also a connective tissue, which means ‘within the muscle’ and it consists of reticular fibres, capillaries, lymphatics and nerves. Then, the next in the cell diagram is the perimysium, which groups the muscle fibres into bundles.
This cell diagram also tells us that there are numerous blood vessels in the skeleton muscle cell, because for the muscles to contract, it takes a high level of vascularization. The skeleton muscle is connected to the bone through a tendon. Even if the skeleton muscle can very a lot regarding to its shape, size and fibres arrangement, this cell diagram is common to all skeleton muscle cells.