Cardiovascular System🫀 Flashcards
What are the main functions of the blood?
To transport different things around the body, to defend against disease and to maintain homeostasis
What is the normal blood PH?
7.35-7.45
What is normal blood temperature?
About 38*
What is the heaviest element in the blood?
Erythrocytes
What is albumin and where is it manufactured?
It is a binding protein that acts as a transport vehicle for fatty acids and steroid hormones. They are manufactured in the liver
What are the three subgroups of globulin and what are their functions?
Alpha and beta (transport ions, lipids and fatty soluble vitamins to the cells - they also contribute to osmotic pressure)
Gamma also known as antibodies (involved in immunity)
What is the plasma protein which is essential for blood clotting?
Fibrinogen
What is the function of T Cell lymphocytes?
Regulates immune responses and directly attacks infected cells
What is the function of B cell lymphocytes?
Producing antibodies that target specific pathogens
What is the function of monocytes?
They circulate the bloodstream and migrate into tissues where they differentiate to combat infections and facilitate tissue repair
What is the process of engulfing pathogens and debris?
Phagocytosis
What do cytokines do?
Help regulate immune responses
What is the function of platelets?
They contribute to inflammation and tissue repair
What is hemopoiesis?
The replacement of plasma
What is the function of thrombopoietin?
Triggers the development of megakaryocytic into platelets
What is haemoglobin?
A large molecule made up of proteins and ions - it consists of 4 folded chains called globin
Where is the heart located?
In the thoracic cavity
What tough membrane separates the heart from other mediastinal structures?
Pericardium
What is the function of the left atrium ?
Receives oxygen-rich blood from the lungs through the pulmonary veins
What is the function of the left ventricle?
Pumps oxygenated blood to the entire body - it receives blood from the left atrium
What is the function of the right atrium?
Receives deoxygenated blood from the body through the superior and inferior vena cava. It then pumps the blood into the pulmonary arteries towards the lung
What is the function of the right ventricle?
Pumps deoxygenated blood to the lungs for oxygenation
What is the function of the pulmonary circuit?
To transport deoxygenated blood from the heart to the lungs, where carbon dioxide is exchanged for oxygen
What does the systemic circuit do ?
Maintains overall function of the body - ensuring that oxygenated blood is distributed to various organs and tissues, supporting their metabolic needs
What carries oxygenated blood from the lungs to the heart ?
Pulmonary veins
What carries deoxygenated blood away from the heart and to the lungs?
Pulmonary arteries
How many chambers are in the heart?
4
What are the three layers of the heart?
Epicardium, myocardium and pericardium
How many valves are in the heart?
4
What is the name of equipment that record electrical activity of the heart over a period of time?
Electrocardiogram
What is lumen?
A hollow passageway where blood flows - every vessel has one
What is the function of an artery?
Transports oxygenated blood from the heart to various tissues throughout the body
What is the function of a vein?
Transports blood towards the heart
What is the inner layer of a blood vessel?
Tunica intima
What is the middle layer of a blood vessel?
Tunica media
What is the outer layer of a blood vessel?
Tunica externa
What is an arteriole?
A very small artery that leads to a capillary
What is the function of a capillary?
Plays a role in the exchange of nutrients, gases and waste products between blood and tissues. It also connects arterioles and venules. The system that they form is also essential for homeostasis and supporting cellular functions throughout the organism