πŸ₯© Skeletal muscle


Introduction
What are muscles made of?


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Introduction

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How do muscles contract? Glad you should ask. Look in any book and you’ll probably be scarred and put off completely. I know I was! I mean what is the deal with Z line, A band, I band…?!

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So let’s look into it very gently indeed. First off, a good idea about what muscles look like on a bigger scale:

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The muscle is attached to the bone (spot the nice bone marrow) by the tendon. Muscle cells have a plasma membrane and cytoplasm much like any other cell, but each has a special name. The membrane is called sarcolemma while the cytoplasm is called…