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38 Cards in this Set
- Front
- Back
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Artery |
a blood vessel that carries blood away from the heart |
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Pulse |
change in the diameter of the arteries following heart contractions |
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Autonomic Nervous System |
the part of the nervous system that controls the motor nerves that regulate equilibrium, and that is not under conscious control |
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Vasoconstriction |
the narrowing of blood vessels, allowing less blood to the tissues |
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Vasodilation |
the widening of blood vessels, allowing more blood to the tissues |
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Atherosclerosis |
a degeneration of blood vessels caused by accumulation of fat deposits in the inner wall |
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Artheriosclerosis |
a group of disorders that cause the blood vessels to thicken, harden, and lose there elasticity |
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Aneurysm |
a bulge in the weakened wall of a blood vessel, usually an artery |
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Vein |
a blood vessel that carries blood towards the heart |
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Septum |
a wall of muscle that separates the right and left sides of the heart |
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Pulmonary Circulatory System |
the system of blood vessels that carries deoxygenated blood to the lungs and oxygenated blood back to the heart |
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Systemic Circulatory System |
the system of blood vessels that carries oxygenated blood to the tissues of the body and deoxygenated blood back to the heart |
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Atrium (plural:atria) |
a thin-walled chamber of the heart that receives blood from the veins |
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Ventricle |
a muscular, thick-walled chamber of the heart that delivers blood to the arteries |
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Atrioventricular(AV) Valve |
a heart valve that prevents the back flow of blood from a ventricle into an atrium |
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Semilunar Valve |
a valve that prevents back flow of blood from an artery into a ventricle |
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Aorta |
the largest artery in the body; carries oxygenated blood to the tissues |
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Coronary Artery |
an artery that supplies the cardiac muscle with oxygen and nutrients |
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Myogenic Muscle |
muscle that contracts without external nerve stimulation |
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Sinoatrial (SA) Node |
a small mass of tissue in the right atrium that originates the impulses stimulating the heartbeat |
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Atrioventricular (AV) Node |
a small mass of tissue in the right atrioventricular region through which impulses from the sinoatrial node are passed to the ventricles |
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Purkinje Fibre |
a nerve fibre that branches and carries electrical impulses throughout the ventricles |
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Sympathetic Nervous System |
a division of the autonomic nervous system that prepares the body for stress |
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Parasympathetic Nervous System |
a division of the autonomic nervous system that returns the body to the normal resting levels following adjustments to stress |
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Diastole |
relaxation(dilation) of the heart, during wich the atria fill with blood |
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Systole |
contraction of the heart, during which blood is pushed out of the heart |
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Cardiac Output |
the amount of blood pumped from the heart each minute |
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Stroke Volume |
the quantity of blood pumped with each beat of the heart |
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Sphygmomanometer |
a device used to measure blood pressure |
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Hypothalamus |
region of the vertebrates brain responsible for coordinating many nerve and hormone functions |
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Thermoregulation |
maintenance of body temperature within a range that enables cells to function efficiently |
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Extracellular Fluid (ECF) |
fluid that occupies the spaces between cells and tissues; includes plasma and intestinal fluid |
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Filtration |
the selective movement of materials through capillary walls by a pressure gradient |
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Lymph |
the fluid found in lymph vessels contains some proteins that have leaked through capillary walls |
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Lymph Node |
a mass of tissue that stores lymphocytes and removes bacteria and foreign particles from the lymph |
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Lymphocyte |
a white blood cell that produces antibodies |
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Spleen |
a lymphoid organ that acts as a reservoir for blood and a filtering site for lymph |
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Thymus Gland |
a lymphoid organ in which T lymphocytes mature |
