The Muscles of the Heart •The heart has specific muscles that cause the heart to contract and open and close the heart values. Some of these muscles are: •Trabeculae Carneae –Irregular muscles of the ventricles •Chordae Tendineae –Small cords that connect the heart values to the papillary muscles
The heart has four chambers, the right atrium and ventricle with the pulmonary circuit and left atrium and ventricle with the systemic circuit. The left ventricle’s greater workload makes it more massive than the right, but the two pump equal amounts of blood.
This chapter outlines the anatomy, physiology, and pathophysiology of the heart, linking the micro- and macroscopic structure of cardiac muscle fiber to its function during contraction and relaxation. The properties of cardiac muscle cells and the process of contraction at a cellular level are also described.
Heart : A powerful muscle slightly larger than a clenched fist. It is composed of four chambers, two upper (the atria) and two lower (the ventricles). It works as a pump to send oxygen-rich blood through all the parts of the body. A human heart beats an average of 100,000 times per day. During that time, it pumps more than 4,300
•Identify chambers and valves of the heart •Explain circulation through heart and coronary anatomy •Identify grafts used for CABG
Human heart is divided into 4 chambers • 2 Atria and 2 Ventricles – these are hollow chambers which receive blood • They are surrounded by myocardial cells which are able to relax and contract The cardiovascular system consists of circuits: • Pulmonary circuit provides blood flow between the heart and lungs
Welcome to Module 1: Anatomy and Physiology of the Heart. This self leaning package is designed to as tool to assist nurse in understanding the hearts structure and how the heart works. This module will form the foundation of your cardiac knowledge and enable you to understand workings of the heart that will assist you in completing other modules.
Anatomy of the Heart Word Bank Pulmonary vein x2 Pulmonary valve Pulmonary artery Aorta Aortic valve Inferior vena cava Mitral valve Left ventricle Tricuspid valve Superior vena cava Right ventricle Right atrium Left atrium Sciencenotes . org . Title:
Innervation of Heart superficial plexus •It is formed by the superior cardiac branch of the left sympathetic trunk and the lower superior cervical cardiac branch of the left vagus nerve. •Its branches are-•(a) to the deep part of the plexus; •(b) to the anterior coronary plexus; and •(c) to the left anterior pulmonary plexus. DR ...
the Heart • The intrinsic conduction system sets the basic heart rate, but this can be modified by the autonomic nervous system • The sympathetic nervous system (the “accelerator”) increases both the rate and the force of heartbeat. • The parasympathetic activation (the “brakes”) slows the heart Dr. Naim Kittana, PhD 36
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