How does the heart work GCSE Bitesize?
The heart is a muscular organ. Its function is to pump blood. The right side pumps blood through the pulmonary circuit , while the left side pumps blood through the systemic circuit .
What type of tissue is the wall of the heart made of GCSE?
(i) The wall of the heart is made mostly of epithelial glandular muscular tissue. (ii) The resting heart rate is controlled by the pacemaker. The pacemaker is located at position 1. 6.
What are the 4 chambers of the heart BBC Bitesize?
The 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 through the atria. Blood from two vena cavae enters the right atrium.
What is the heart ks2?
The heart sits within the chest cavity between the lungs and is about the size of a fist. Essentially it is a muscle which functions as a really powerful pump. The heart takes in blood low in oxygen from the body. It pumps it through the right side of the heart and on to the lungs.
How do heart valves become faulty GCSE?
Faulty heart valves Heart valves may become faulty. A valve may not: open as wide as it should, restricting blood flow through the heart – this means less blood reaches the body, pressure builds up and the lungs can swell with fluid. close properly and allow blood to leak back through into the atrium.
What is the cardiac cycle GCSE PE?
The cardiac cycle refers to the pattern of contraction and relaxation of the heart during one complete heartbeat. Contraction of the heart muscle is known as systole and relaxation of the heart muscle is called diastole.
How does the heart pump blood BBC Bitesize?
The pathway of blood through the heart Oxygenated blood is carried to the heart from the lungs in the pulmonary vein. It goes into the left atrium, through the bicuspid valve and into the left ventricle. The ventricle pumps the blood through the semilunar valve, into the aorta and round the body.
How does the heart work for dummies?
Your heart is sort of like a pump, or two pumps in one. The right side of your heart receives blood from the body and pumps it to the lungs. The left side of the heart does the exact opposite: It receives blood from the lungs and pumps it out to the body.
Why a person with a leaking heart valve has difficulty exercising GCSE?
With a leaky valve, sometimes not enough blood gets pumped to the rest of the body. Heart valve leakage/regurgitation can force the heart to work harder to do its job.
