Left heart is a term used to refer collectively to the left atrium and left ventricle of the heart. This page is about the muscular organ, the Heart. ... In the heart, a ventricle is a chamber which collects blood from an atrium (another heart chamber) and pumps it out of the heart. ... The heart and lungs (from an older edition of Grays Anatomy) The heart (Latin cor) is a hollow, muscular organ that pumps blood through the blood vessels by repeated, rhythmic contractions. ...
The left atrium receives oxygenatedpulmonicblood from the pulmonary veins. The blood is then pumped through the mitral valve into the left ventricle, which in turn pumps the blood through the aortic valve into the aorta. General Name, Symbol, Number oxygen, O, 8 Chemical series nonmetals Group, Period, Block 16, 2, p Appearance colorless Atomic mass 15. ... The pulmonary circulation is a circuit of blood circulation in the cardiovascular system, serving exclusively the lungs, where red blood cells pick up oxygen and releasecarbon dioxide during respiration. ... Red blood cells (erythrocytes) are present in the blood and help carry oxygen to the rest of the cells in the body Blood is a circulating tissue composed of fluid plasma and cells (red blood cells, white blood cells, platelets). ... The pulmonary veins carry blood from the lungs to the left atrium of the heart. ... The mitral valve is a valve in the heart that lies between the left atrium (LA) and the left ventricle (LV). ... The aortic valve is one of the valves of the heart. ... The largest artery in the human body, the aorta originates from the left ventricle of the heart and brings oxygenated blood to all parts of the body in the systemic circulation. ...
In the human body, the heart is normally situated slightly to the left of the middle of the thorax, underneath the sternum (breastbone).
It is enclosed by a sac known as the pericardium and is surrounded by the lungs.
The heart also secretes ANF (atrial natriuretic factor), a powerful peptide hormone, that affects the blood vessels, the adrenal glands, the kidneys and the regulatory regions of the brain to regulate blood pressure and volume.
In a child with Hypoplastic LeftHeart Syndrome, all of the structures on the left side of the heart (the side which receives oxygen-rich blood from the lungs and pumps it out to the body) are severely underdeveloped.
This results in a situation where the left side of the heart is completely unable to support the circulation needed by the body's organs, though the right side of the heart (the side that delivers blood to the lungs) is typically normally developed.
This heart defect is one of the most readily diagnosed on fetal echocardiograms and is one of the most common cardiac defects picked up on screening obstetrical ultrasounds.
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