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Microscopic Anatomy and Contraction of Skeletal Muscle. We have already examined the structure of skeletal muscle as seen with the light microscope. As you know, skeletal muscle tissue has alternating light and dark bands, giving it a striated appearance. The electron microscope shows that these bands are due to the arrangement of myofilaments in a muscle fiber

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Bones and Muscles Song (Skeletal and Muscular Systems)

Bones and Muscles Song (Skeletal and Muscular Systems) sing to the tune of "California Girls" by Katy Perry

Synapse. SEM of a neuromuscular junction showing a motor neuron (orange) terminating on skeletal muscle fibers (pink).

Week 3. No bones about it; your bones can’t do much without muscles to move them. You have three major types of muscle tissue known as skeletal, smooth, and cardiac muscle. Learn about all 11 organ systems with the Amoeba Sisters!, w3

The Spinal Cord and Muscles Working Together The spinal cord is divided into five sections: the cervical, thoracic, lumbar, sacral, and coccygeal regions. The level of injury determines the extent of paralysis and/or loss of sensation. No two injuries are alike. The diagram illustrates the connections between the major skeletal muscle groups and each level of the spinal cord. A similar organization exists for the spinal control of the internal organs.

Emery-Dreifuss muscular dystrophy (EDMD) is a rare disease characterized by early contractures (especially in the neck, elbows and ankles), slowly progressing muscle weakness more prominent in humeroperoneal region, onset between 5 and 15 years of age, and peculiar cardiac problems followed by death in some cases and need for a permanent cardiac pacemaker in others1-5. The first report of this syndrome was compatible with an X-linked recessive myopathy.

Skeletal Muscle Tissue; very elongated cells multinucleated (multi = many) cells and nuclei are peripheral (next to the plasma membrane) cells are striated (they have alternating dark and light bands)

Neuromuscular junction. The nerve (in white) transmits its signal to the skeletal muscle (grey tubes) to generate contraction.

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This A - Z Challenge post is brought to you by the letter "M"

“M” is for Muscles: Muscle  is a contractile tissue whose function is to produce force and cause motion.  This force can cause either locomotion of the organism itself or movement of internal organs...


The human heart stripped of fat and muscle, with just the angel veins exposed

“The human heart stripped of fat and muscle, with just the angel veins exposed.”