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Intercalated discs

Intercalated disc

An electron dense junctional complex, at the end to end contacts of cardiac muscle cells, that contains gap junctions and desmosomes. most of the disc is formed of a convoluted fascia adherens type of junction into which the actin filaments of the terminal sarcomeres insert (they are therefore equivalent to half Z bands), desmosomes are also present. The lateral portion of the stepped disc contains gap junctions that couple the cells electrically and thus coordinate the contraction.

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Help with the Heart!!

... sinus? 3) The myocardium does not contain which of the following: intercalated discs, conduction (Purkinje) fibers, sarcomeres, visceral pericardium, trabeculae carne I am ...

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by amanderkinz
Mon Feb 28, 2011 3:04 am
Forum: Physiology
Topic: Help with the Heart!!
Replies: 2
Views: 5316

Re: Special heart muscle

... * Short fat branching cells *One large central nucleus per cell *Intercalated discs * Myofibril-like units *High capillary density *Large no. of mitochondria *Large sarcoplasmic ...

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by opuntia
Fri Jul 08, 2005 12:26 pm
Forum: Human Biology
Topic: Special heart muscle
Replies: 1
Views: 3937

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