Section 3
Cardiac Muscle Tissue
Book
Version 29
By Boundless
By Boundless
Boundless Anatomy and Physiology
Physiology
by Boundless
3 concepts
![Thumbnail](../../../../../../figures.boundless-cdn.com/1440/square/uskel-molekulartranslation.jpg)
Microscopic Anatomy
Cardiac muscle appears striated due to the presence of sarcomeres, the highly-organized basic functional unit of muscle tissue.
![Thumbnail](../../../../../../figures.boundless-cdn.com/3811/raw/sarcomere.jpg)
Mechanism and Contraction Events of Cardiac Muscle Fibers
Cardiac muscle fibers undergo coordinated contraction via calcium-induced calcium release conducted through the intercalated discs.
![Thumbnail](../../../../../../figures.boundless-cdn.com/15319/square/myoglobin-and-heme.jpg)
Energy Requirements
Cardiac cells contain numerous mitochondria, which enable continuous aerobic respiration and production of adenosine triphosphate (ATP) for cardiac function.