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Explain skeletal muscle.
highly organized with connective tissue wrappings.
One reason is to allow the muscles to work independently of each other. Each muscle is isolated from adjacent muscles
What are the parts of skeletal muscle
- the CT wrapping that goes around the entire muscle
- This is what isolates one muscle from the other. It is less obvious in lower forms, but much more obvious in higher forms
within a muscle, you have the fibers organized into bundles or fascicles. And, each bundle is enclosed and separated by connective tissue, which is the perimysium. It organizes the individual muscles into bundles or fascicles
very delicate connective tissue wrapping around each fiber (skeletal muscle fiber)
join muscle to bone
join bone to bone
flat sheets of CT that are attached to muscle
Purpose: distribute tension on that muscle
loose CT that binds muscle to muscle and skin to muscle
the muscle attachment point; freely movable portion
also a muscle attachment point but a relatively fixed attachment
Types of muscle action
- prime movers
the muscles that must contract to achieve a particular movement
a group of opposing muscles that must relax to achieve the above movement; typically, the antagonist does the antagonistic movement; therefore, it must rest when one is trying to move
a group of muscles that usually supplement the prime movers; they are not responsible for the main movement, but they aid in it
Whenever you have a movement, you have __
a series of muscles that must contract to achieve a particular movement
In terms of naming muscles, how are they named?
they are named in a variety of ways based on either the number, the movement, the components, location, etc