WebThe heart beat. Specialised cells in the right atrium generate electrical signals that make the heart contract independently of the nervous system. These specialised cells act as a … WebGCSE BBC Science Bitesize - Breathing JamJarMMX 12.8K subscribers 471 181K views 10 years ago This GCSE BBC Bitesize video is from the original programmes from 2000 that were broadcast on...

Control of the heart rate - Exchange surfaces and transport …

WebThe heart is a muscular organ. Its function is to pump blood. The cardiac muscle of the heart contracts to pump the blood from the atria into the ventricles and from the … WebHeart Action: Initiation & Control. Control of the basic heartbeat is myogenic, which means the heart will beat without any external stimulus. This intrinsic rhythm means the heart beats at around 60 times per minute. The sinoatrial node (SAN) is a group of cells in the wall of the right atrium. The SAN initiates a wave of depolarisation that ... tahoe chinese

Human Circulatory System GCSE Biology Revision Notes

WebFeb 10, 2024 · Designed for the new specification AQA GCSE course but can be modified for other exam boards. 23 slides covering the The heart and blood vessels. By the end of the … WebSep 21, 2024 · The cardiac conduction system refers to how electrical impulses enable the heart to beat. Advert The heart is unique in that it never tires and is able to generate its own electrical impulses without the need for stimulation from the central nervous system. On average the heart beats approximately 70 beats per minute. WebThe heart has four chambers - two atria and two ventricles. Note that left and right refers to the side in the person's body, not how it is viewed on the page. Blood enters the heart … What is a transport system? - Revise the circulatory system for GCSE Combined … tahoe chicago