Unidirectional blood flow is essential and the primary function of heart valves. Malformation and dysfunction of these complex structures result in potentially fatal pathologies. In this chapter, the formation, anatomy, and histology of the four cardiac valves will be described. These four cardiac ...
Okay, so let's talk a little bit about pumping.Each heart beat sounds something like "lub-dub", lub-dub", lub-dub."That first heart sound, "lub", is called S1,and the noise comes from the tricuspid and mitral valves snapping shut when the left and right ventricles contract,which happ...
Anatomy & physiology of the circulatory system (heart) 循环系统的解剖与生理学(心脏) The circulatory system is also called the cardiovascular system,where cardio- refers to the heart and vascular refers to the blood vessels.So these are two key parts:the heart --which pumps blood--and the blo...
The heart has four chambers – two superioratriaand two inferiorventricles. The internal partition that divides the heart longitudinally is called theinteratrial septumwhere it separates the atria, and theinterventricular septumwhere is separates the ventricles. The right ventricle forms most of the ante...
Learn About the Body's Connective Tissue Epithelial Tissue: Function and Cell Types Anatomy of the Heart: Valves Overview of the Thymus Gland Types of Circulatory Systems: Open vs. Closed Neuron Anatomy, Nerve Impulses, and Classifications Circulatory System: Pulmonary and Systemic Circuits ...
To learn more about how the heart works, review the accompanying lesson on the Anatomy of the Heart. This lesson covers the following objectives: Understand the role of the 5 heart valves Identify the effect of the closing of the semilunar valve Define the heart chamber receiving blood fro...
Heart Structure and Functions Layers of the Heart Chambers of the Heart Associated Great Vessels Heart Valves Cardiac Circulation Vessels Blood Vessels Tunics Major Arteries of the Systemic Circulation Major Veins of the Systemic Circulation Physiology of the Heart ...
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spinal cord, and processes it in the brain. The nervous system directs our body’s reactions to the world and also controls most of our internal functions, everything from muscle movement and blood vessel dilation to the learning of anatomy and physiology facts. How does it manage all this?
Heart Anatomy Size, Location, and orientation The heart is around the size of a fist and weighs between 250-350 grams (less than a pound). Enclosed within themediastinum, the medial cavity of the thorax, the heart extends obliquely from the second rib to the fifth intercostal space. It res...