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30 paź 2023 · This article will look at the early embryology of the heart (not including cardiac origami), review the basic gross anatomy, and discuss the cellular architecture and histological arrangement of the organ.
6 dni temu · A thick web of collagen (the strongest protein found in nature) and elastin fibers makes up the dense irregular connective tissue and provides great strength and elasticity to the dermis. Many arterioles and venules also pass through the reticular layer to provide blood flow to the superficial tissues of the papillary layer and epidermis.
3 lis 2023 · Nerves and blood vessels that supply the heart are found in the epicardium. At the roots of great vessels, the epicardium reflects back and continues as the parietal pericardium, forming an enclosed pericardial sac.
As with the rest of the circulatory system, the heart has three layers, as shown in the diagram below and the photo on the right: You also need to know about Purkinje fibres, which lie in the endocardium. This layer contains fibroelastic connective tissue, blood vessels, lymphatics and adipose tissue.
The endocardium, which surrounds the lumen of the heart, is itself composed of three layers: a simple squamous endothelium that covers the luminal surface; a thin subendothelial layer of loose collagenous tissue; and a subendocardium, a thicker layer of more dense
24 mar 2022 · Myocardium is the thick middle layer of muscle that allows your heart chambers to contract and relax to pump blood to your body. Pericardium is the sac that surrounds your heart. Made of thin layers of tissue, it holds the heart in place and protects it.
Two labeled diagrams presenting the anatomy of the heart and the circulatory systems. The top right provides an in-depth diagram of the anatomy of the chambers, valves, and vasculature connected to the heart. The bottom left emphasizes the anatomy of the systemic and pulmonary circulations.
