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Atmospheric air (21% of the air you breath is oxygen) is inhaled through the mouth and into the lungs via negative pressure created in the chest cavity by accessory muscles. Once in the lungs, the air continues to travel in the airways until it reaches the tiny air-filled sacs called alveloli. Your body contains about 150 million alveoli, each of which are about one cell thick and covered with capillary blood vessels. The sheer number and thin membrane of alveoli increases surface area within the lungs, optimizing the alveolus' ability to allow gasses to diffuse through their membrane in mass quantity. Oxygen follows a concentration gradient from ambient air still in the alveoli (where it is more concentrated), through alveolar membranes into deoxygenated blood returning to your lungs via blood vessels leaving the right side of the heart. This concentration gradient is what drives oxygen into the blood plasma (the fluid component of blood). Once here, the hemoglobin in red blood cells begin to pick up the oxygen molecules from the plasma where a majority of it is ultimately stored. In fact, approximately 98% of oxygen in the blood of a healthy adult is bound to hemoglobin in this manner and is referred to as "oxygen saturation." This oxygen saturation can be measured with a device called a "pulse oximeter" that passes a light through your skin, quantifying the percentage of oxygen bound to hemoglobin. Most people in medicine consider a oxygen saturation of > 95% to be normal. BLood can sometimes become purple in this proccess.
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What does myocardium receive it's blood supply directly from?
The myocardium receives blood from the coronary arteries.
What is deficient blood supply to the myocardium called?
Deficient blood supply to the myocardium is called ischemia. This lack of blood flow can result in decreased oxygen and nutrients reaching the heart muscle, leading to potential damage if left untreated.
Where is myocardial tissue?
You have three layers in the heart. Outer layer is pericardium, middle layer is myocardium and inner layer is endocardium. Myocardium is composed mainly of cardiac muscles, connective tissue and blood vessels.
If the blood supply to the myocardium stops what happens?
that part of the heart tissue dies
What is the purpose of the myrocardium?
The myocardium is the middle layer of the heart muscle responsible for pumping blood throughout the body. It contains specialized cells that contract to create the force needed for blood circulation. The main purpose of the myocardium is to ensure efficient functioning of the heart as a pump.
When the myocardium does not receive enough blood?
Infarction
Where does the myocardium receive its blood supply?
the coronary arteries
Where does the Myocardium receive all of its blood supply?
coronary arteries
What does myocardium receive it's blood supply directly from?
The myocardium receives blood from the coronary arteries.
Trace the pathway of a drop of blood from the myocardium of the heart to the arm?
The myocardium does not have blood flow to the arm. The myocardium is the muscle of the heart and therefore only supplies blood to the heart.
Which coronary artery supplies blood to the inferior myocardium?
The Right Coronary Artery supplies blood to the inferior myocardium
What layer of the heart actually pumps blood?
The myocardium (middle layer) has the bulk of the muscle which pumps blood from the ventricles.
Where does blood enter the myocardium?
Oxygenated blood is brought to the myocardium by coronary arteries. These arteries are located all around he surface of the heart.
Which provide blood to the myocardium?
Coronary arteries
Blood is supplied to the myocardium by means of the?
coronary
Myocardium is made of?
The myocardium is the middle layer of the walls of the heart, made of cardiac muscle, that contracts to push out blood.
Functions of myocardium?
pumping blood and gives morphine
