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Module 1: Módulo 16: Introdução aos tecidos musculares

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Makeup of an individual Skeletal Muscle

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The individual skeletal muscle is composed primarily of striated muscle fibers and FCT fibers.

Striated Muscle Fibers tab:
There are two types of striated muscle fibers—fast (white) and slow (red). Fast (white). The fast striated muscle fibers can contract rapidly and strongly but only for a short time. Slow (red).

The slow striated muscle fibers tend to contract more slowly but for a sustained duration. The red color of slow striated muscle fibers is because of myoglobin protein.

This protein has the capacity to store oxygen within the sarcoplasm. Thus, oxygen is available for the production of energy during the contraction.

FCT Fibers tab:
Endomysium.
The endomysium is a meshwork of FCT that surrounds each striated muscle fiber individually.

Perimysium.
A group of these striated muscle fibers is bound together in a bundle (fascicle) by an FCT envelope known as the perimysium.

Epimysium.
The entire muscle is bound within an FCT sheath called the epimysium.