Mammalian Circulatory system
vessel with thick, strong walls that carries high-pressure blood away from the heart
What is an artery?
a graph showing the percentage saturation of a pigment (such as hemoglobin) with oxygen, plotted against the partial pressure of oxygen
What is an oxygen dissociation curve?
the stage of the cardiac cycle when the muscle in the walls of the heart relaxes
What is diastole?
a word used to describe muscle tissue that contracts and relaxes even when there is no stimulation from a nerve
What is myogenic?
small artery
What is an arteriole?
a circulatory system made up of vessels containing blood
What is a closed circulatory system?
an enzyme found in the cytoplasm of red blood cells that catalyses the reaction between carbon dioxide and water to form carbonic acid
What is carbonic anhydrase?
the stage of the cardiac cycle when the muscle in the walls of the atria contract
What is the atrial systole?
the degree to which the hemoglobin in the blood is combined with oxygen, calculated as a percentage of the maximum amount with which it can combine
What is percentage saturation?
small vein
What is a venule?
a system that carries fluids around an organism’s body
What is a circulatory system?
compound formed when carbon dioxide binds with haemoglobin
What is carboxyhaemoglobin?
patch of tissue in the septum of the heart which transmits the wave of excitation from the walls of the atria and transmit it to the Purkinje tissue
What is the atrioventricular node (AVN)?
a bundle of fibers that conduct the wave of excitation down through the septum of the heart to the base (apex) of the ventricles
What is Purkinje tissue?
vessel with thick, strong walls that carries high-pressure blood away from the heart
What is an artery?
the part of the circulatory system that carries blood from the heart to the gas exchange surface, and then back to the heart
What is the pulmonary system?
the movement of chloride ions into red blood cells from blood plasma, to balance the movement of hydrogencarbonate ions into the plasma from the red blood cells
What is chloride shift?
the stage of the cardiac cycle when the muscle in the walls of the ventricular contract
What is the ventricular systole?
the liquid component of blood, in which the blood cells float; it carries a very large range of different substances in solution
What is plasma?
vessel with relatively thin walls that carries low-pressure blood back to the heart
What is a vein?
the part of the circulatory system that carries blood from the heart to all of the body except the gas exchange surface, and then back to the heart
What is the systemic circulation?
the decrease in affinity of haemoglobin for oxygen that occurs when carbon dioxide is present
What is Bohr shift?
a patch of cardiac muscle in the right atrium of the heart which contracts and relaxes in a rhythm that sets the pattern for the rest of the heart muscle
What is the sinoatrial node (SAN)?
the almost colorless fluid that fills the spaces between body cells; it forms from the fluid that leaks from blood capillaries
What is tissue fluid?
the smallest blood vessel, whose role is to deliver oxygen and nutrients to body tissues, and to remove their waste products
What is a capillary?