Microscopic muscle structure

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Physical Education - Microscopic muscle structure

Microscopic muscle structure

Microscopic muscle structure

Muscles are made up of the following components (from largest to
smallest):

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* - a group of muscle fibres that are surrounded by connective tissue

* - the name given to the connective tissue that surrounds the fasciculi

* - encases the muscle to hold everything together. As it nears the end
of the muscle it thickens to eventually become the tendon

* Myofibrils [1] - muscle fibres are made up of myofibrils and are
similar to the many wires that make up a cable

* Sarcomere [2] - myofibrils have many units known as sarcomeres. These
are arranged end to end for the entire length of the fibre

* Z lines [3] - These lines mark where one sarcomere starts and another
finishes.

* - Myofibrils [4] can be further divided into myofilaments. There are
two types of myofilaments - actin [5] (thin filaments) and myosin [6]
(thick filaments)

* - the cell membrane [7] that surrounds the muscle fibre

* contains the following:

* Mitochondria [8]

* Myoglobin

* Fat, glycogen, ATP, PC

* Enzymes

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[1] http://alison.com/#
[2] http://alison.com/#
[3] http://alison.com/#
[4] http://alison.com/#
[5] http://alison.com/#
[6] http://alison.com/#
[7] http://alison.com/#
[8] http://alison.com/#