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1. teachmeanatomy.info › thorax › organsThe Conducting System of the Heart - TeachMeAnatomy

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   Apr 24, 2023 · The cardiac conduction system is a collection of nodes and specialised conduction cells that initiate and co-ordinate contraction of the heart muscle. It consists of: Sinoatrial node. Atrioventricular node. Atrioventricular bundle (bundle of His) Purkinje fibres. In this article, we shall look at the anatomy of the cardiac conduction system ...

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2. med.libretexts.org › Bookshelves › Anatomy_and17.3A: Mechanism and Contraction Events of Cardiac Muscle ...

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   In cardiac, skeletal, and some smooth muscle tissue, contraction occurs through a phenomenon known as excitation contraction coupling (ECC). ECC describes the process of converting an electrical stimulus from the neurons into a mechanical response that facilitates muscle movement. Action potentials are the electrical stimulus that elicits the ...

3. www.bjaed.org › article › S2058-5349(23)00077-XCardiac muscle physiology - BJA Education

   www.bjaed.org › article › S2058-5349(23)00077-X

   The heart is a biomechanical pump at the centre of our circulatory system. It contracts rhythmically from approximately 6 weeks of gestational age until death.1 Contractions are initiated by action potentials, arising from pacemaker cells, transmitted to individual cardiomyocytes via specialised conduction pathways, through intercalated discs and gap junctions between cells.2 The arrival of ...

4. geekymedics.com › the-hearts-conductiThe Heart’s Conduction System - Geeky Medics

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   May 10, 2020 · The heart has two main types of cells: 1. Conducting cells: generate and propagate electrical impulses. Contractile (muscle) cells: contract following receipt of electrical impulses. These cells can also propagate and, on occasion, generate electrical impulses. Both conducting and specialised muscle cells form the hearts conduction system and ...

5. biologydictionary.net › cardiac-muscleCardiac Muscle - Definition, Function and Structure | Biology ...

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   Oct 4, 2019 · Cardiac Muscle Definition. Cardiac muscle, also known as heart muscle, is the layer of muscle tissue which lies between the endocardium and epicardium. These inner and outer layers of the heart, respectively, surround the cardiac muscle tissue and separate it from the blood and other organs. Cardiac muscle is made from sheets of cardiac muscle ...

6. bio.libretexts.org › Bookshelves › Introductory_and40.11: Mammalian Heart and Blood Vessels - The Cardiac Cycle

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   Oct 31, 2023 · The Cardiac Cycle. The main purpose of the heart is to pump blood through the body; it does so in a repeating sequence called the cardiac cycle. The cardiac cycle is the coordination of the filling and emptying of blood by electrical signals that cause the heart muscles to contract and relax. The human heart beats over 100,000 times per day.

7. People also ask

   What controls the pumping action of the heart muscle?

   • The pumping action of the heart muscle is controlled by an spontaneous electrical impulse, conducted around the heart by specialised cells. This article will look at the key structures involved in the generation and conduction of that electrical impulse.

   Conducting System of the Heart - SA Node - TeachMeAnatomy

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   Which muscle cell is responsible for pumping the heart?

   • Cardiomyocytes, or cardiac cells, are striated and are responsible for the pumping of the heart; they are the only muscle cells with intercalated disks. The heart’s internal pacemaker regulates and times the beating of the heart via electrical signals.

   40.11: Mammalian Heart and Blood Vessels - The Cardiac Cycle

   bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/General_Biology_(Boundless)/40:_The_Circulatory_System/40.11:_Mammalian_Heart_and_Blood_Vessels_-_The_Cardiac_Cycle

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   What does a San do in a heart?

   • As the electrical activity spreads along the heart’s conduction system it initiates myocardial contraction in the surrounding myocardial tissue. The SAN functions as the heart’s intrinsic pacemaker, regulating heart rate. The SAN spontaneously generates electrical impulses which are transmitted to the right and left atrium.

   The Heart's Conduction System | Physiology, Anatomy - Geeky Medics

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   How does the pericardium lubricate the heart?

   • The outer layer, known as the epicardium or visceral pericardium, surround the cardiac muscle on the exterior. This helps protect it from contact with other organs. The parietal pericardium attaches to this outer layer creates a fluid-filled layer which helps lubricate the heart.

   Cardiac Muscle - Definition, Function and Structure - Biology Dictionary

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8. med.libretexts.org › Bookshelves › Anatomy_and17.3: Cardiac Muscle and Electrical Activity - Medicine ...

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   Aug 19, 2024 · Figure 17.3.4 17.3. 4 show the spread of the electrical wave through these structures and the myocardial contractile cells. Figure 17.3.4 17.3. 4: Cardiac Conduction. (1) The sinoatrial (SA) node and the remainder of the conducting system are at rest. (2) The SA node initiates the electrical wave, which sweeps across the atria.