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...
Anatomy of the Human Heart essaysThe heart is a hollow muscular organ. It is located between the lungs approximately in the middle of the chest. It is positioned in the thoracic cavity between the sternum and the vertebrae. It was placed there meticulous
Heart Valves Blood flows through the heart in one direction: from the atria to the ventricles and out the great arteries leaving the superior aspect of the heart. Four valves enforce the one-way traffic. They open and close in response to differences in blood pressure. ...
Physiology of the Heart As the heart beats or contracts, the blood makes continuous round trips- into and out of the heart, through the rest of the body, and then back to the heart- only to be sent out again. Intrinsic Conduction System of the Heart ...
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 ...
Physiology of the Heart Coronary Systole and Diastole At any given time the chambers of the heart may found in one of two states: Systole. During systole, cardiac muscle tissue is contracting to push blood out of the chamber. Diastole. During diastole, the cardiac muscle cells relax to all...
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