ANAT 216 Lecture Notes - Lecture 9: Sliding Filament Theory, Gap Junction, Pericardium
2 Oct 2017
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Document Summary
Cardiovascular system: heart 2 (reading material: chapter 21: pages 550-552; 561-566) Cardiac cells bound together by connective tissue therefore cardiac muscle is arranged in myocardium endocardium fibrous skeleton (fibrous ring structure) Consists of cardiac muscle and forms bulk of heart wall. Endothelium lining inside of the heart spirals/bundles that interlock and link all parts of myocardium together. Therefore when heart contracts there is a slight twisting movement that helps with function of myocardium as it beats. This is known as fibrous skeleton of heart. Provides structural support for the tissues of the heart, to prevent them from being overstretched in its vigorous actions. Contraction accomplished through sliding filament theory branched cells (short and stout) Space btwn branches is filled with ct called endomysium (full of capillaries) o2 and nutrients are in high demand in busy heart one or two centrally located nuclei endomysium intercalated discs: Intercallated disk adjacent plasma membranes are interconnected with each other.
