HTHSCI 1H06 Lecture Notes - Lecture 3: T Wave, Extracellular Fluid, Superior Vena Cava

• School: McMaster University
• Department: Health Sciences
• Course: HTHSCI 1H06
• Professor: Peter Helli

Document Summary

Describe the structural and functional characteristics of cardiac muscle tissue and the conduction system of the heart. Explain the relationship of the ecg and the cardiac cycle. Define cardiac output, stroke volume and heart rate. Describe the factors that affect stroke volume. Describe the factors that regulate heart rate. A focus on myocardium (thick muscle tissue in the heart wall compromised of specialized myocardium cells) Striated (cells are striated like skeletal muscle), involuntary muscle (like smooth muslces) Fibres swirl diagonally around heart in bundles. Heart (cid:858)(cid:449)ri(cid:374)gs(cid:859) (cid:271)lood out of the (cid:448)e(cid:374)tri(cid:272)les. Endocardium is going to be continuous with the lining of the blood vessels that come off of the heart, pulmonary trunk and aorta. Provides non-thermogenic layer so blood can move smoothly and glide along that layer. Features that give it its unique properties: Within the cell membrane are areas of thickening, and within the areas of thickening of the sarcolemma are intercalated disks.