ANATOMY 1 Lecture Notes - Lecture 8: Simple Squamous Epithelium, Loose Connective Tissue, Heart
Document Summary
Actin: forms the backbone of the thin filament. Myosin: myosin tails from the shaft of the thick filaments; head bind to the myosin binding sites of the actin during muscle contraction. Tropomyosin: part of the thin filament, block myosin binding sites when the muscle is relaxed. Troponin: part of the thin filament; hold the trypomysin together. Myomesin: forms the m-line; stabilize the position of the thick filament. Nebulin: stabilize the position of the thin filaments. Dystrophin: links the thin filaments to membrane protein of the sarcolemma; transmit muscle tension to the tendons. Titin: spring like protein that prevent overstretching (largest protein in human body) Lumen- space enclosed by vessels or any other tubular organ. Subendothelial layer- loose connective tissue (endothelium is connected to this) Consist of smooth muscle sandwiched in between 2 layers of elastic connective tissue. Pulls heart in place and prevents from overfilling blood. Parietal layer- adheres to the inner surface of the fibrous pericardium.
