HM Practical - Cardiac Histology: Difference between revisions

Revision as of 14:23, 24 July 2012

Adult human cardiovascular system

HMA Practical 8 Monday August 6 and Wednesday August 8.

This page provides histology support information for cardiac histology.

Disclaimers

Cardiac muscle, the myocardium, consists of cross-striated muscle cells, cardiomyocytes, with one centrally placed nucleus.

Nuclei are oval, rather pale and located centrally in the muscle cell which is 10 - 15 µm wide.
Cardiac muscle cells excitation is mediated by rythmically active modified cardiac muscle cells.
Cardiac muscle is innervated by the autonomic nervous system (involuntary), which adjusts the force generated by the muscle cells and the frequency of the heart beat.

Cardiac muscle histology

Image of primate heart stained with Alizarin blue.

Red Blood Cells (orange cells) Cardiac Muscle Cells (blue)
Cardiac muscle cells are cut longitudinally.
At high magnification see both striations and the large nuclei of the cardiac muscle cells.
Follow the course of individual cardiac muscle cells and note fine, dark blue lines which seem to cross (traverse) the fibres.
These are the intercalated discs that connect the individual muscle cells and permit the conduction of electrical impulses between the cells.

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Cite this page: Hill, M.A. (2024, May 19) Embryology HM Practical - Cardiac Histology. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/HM_Practical_-_Cardiac_Histology

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 * does not cover the pathology content.
+===Introduction===
+Cardiac muscle, the myocardium, consists of cross-striated muscle cells, cardiomyocytes, with one centrally placed nucleus.
+* Nuclei are oval, rather pale and located centrally in the muscle cell which is 10 - 15 µm wide.
+* Cardiac muscle cells excitation is mediated by rythmically active modified cardiac muscle cells.
+* Cardiac muscle is innervated by the autonomic nervous system (involuntary), which adjusts the force generated by the muscle cells and the frequency of the heart beat.
 ==Histology==