cardiac Flashcards
what is the purpose of the cardiac system?
the cardiovascular system’s main goal is to ensure that the body’s blood flows appropriately.
what are the upper and lower chambers of the heart called
the septum, a narrow muscle wall, divides the left and right halves of your heart.
there are upper and lower chambers in the heart on both sides which are the atrium. The terms “left ventricle” and “right ventricle” refer to the lower chambers.
circulatory pathways
what does the pulmonary pathway do
brings blood that is low in oxygen from the right ventricle to the lungs, where it finds a new supply of blood. The blood that is rich in oxygen is then returned to the left atrium.
electrical pathways
frequent,regular electrical impulses maintain the hearts ability to what
the signal passes by these routes from the heart’s upper chambers to its lower chambers, causing the heart muscle to contract.
frequent, regular electrical impulses maintain the heart’s ability to pump blood to the lungs.
what is cornary heart disease
coronary heart disease - a narrowing or blockage of the coronary arteries, which prevents the heart from receiving enough blood flow.
heart attack - occurs when a section of your heart muscle’s blood supply is totally cut off. The most frequent reason for this is when a fatty fragment breaks off and a blood clot forms inside a coronary artery.
valve disease - the heart’s valves open and close to control the blood flow. problems with the valves can increase the workload of your heart and can put a strain on your heart muscle. symptoms include - shortness of breath, swollen ankles, fatigue, chest pain, dizziness or fainting
in arrhythmia whats the scientific name of the heart beating too quickly?
high blood pressure - The disease known as hypertension, or elevated blood pressure, can also have an impact on the heart. Hypertension raises the chance of developing catastrophic illnesses such as coronary heart disease, heart attacks, and strokes, even though it is not a disease in and of itself.
Arrhythmia - an electrical system within the heart muscle aids in causing a heartbeat. Your heart may beat irregularly, too rapidly (tachycardia), too slowly (bradycardia), or both if the electrical signals inside it are disrupted or broken. We refer to this as an arrhythmia (abnormal heart rhythms).
what are the components of blood and their functions?
Red blood cells, white blood cells, platelets, and plasma make up its four primary constituent parts. Among the many diverse jobs that blood performs is delivering nutrients and oxygen to the tissues and lungs.
plasma is responsible for transporting platelets, red blood cells, and white blood cells throughout the body.
red blood cells carry oxygen from the lungs to the rest of the body.
white blood cells help fight off pathogens
platelets help in blood clotting
what are the 3 structures of blood vessels called?
adventitia: Nerves and small blood arteries are found in the outer layer. It helps eliminate waste and carries nutrients and oxygen from your blood to your cells. It also provides the structure and stability for blood vessels.
media: Elastic fibres in the middle layer maintain the direction of blood flow in your body. The media also aids in the expansion and contraction of arteries.
tunica intima: Your body’s inner layer surrounds your blood as it circulates throughout it. It keeps chemicals out of your circulation, controls blood pressure, and avoids blood clots. It maintains the smooth flow of your blood.
