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39 Cards in this Set

  • Front
  • Back
Upper heart chambers. Receive blood from veins
Atrioventricular (AV) Node
Relays the signal from SA node to ventricles to regulate their contraction
Sensory receptor in some arteries that senses blood pressure and signals Medulla oblongata to increase or decrease pressure
Blood Vessels
Tubes that transport blood throughout body
What are the five types of blood vessels?
Arteries, Arterioles, Capillaries, Venules, Veins
Conducts blood away from the heart and toward the capillaries
The smallest arteries. Supply blood to the capillaries
Smallest blood vessels. Sites of oxygen and CO2 exchange between blood and tissues.
Small blood vessel that transports blood from capillaries toward heart
Thin-walled blood vessel that returns blood to the heart
Cardiac Cycle
Sequence of events encompassing one complete contraction and relaxation cycle of the heart.
Red Blood Cell. Doughnut shaped cells due to lack of nucleus, also lack mitochondria. Carry oxygen to cells.
Muscular organ that pumps blood throughout body in two circuits
What are the two circuits of circulation?
Pulmonary and Systemic
Pulmonary Circuit
From right side of heart. Sends blood to lungs to pick up oxygen
Systemic Circuit
From left side of heart. Transports blood throughout body to deliver oxygen to tissues.
Oxygen-binding pigment in blood. Red due to iron, which binds the oxygen
Uncontrolled proliferation of blood cells
White blood cells. Function in housekeeping and body defense. Variety of different cell types
Release histamine and other substances during inflammatory response
Attack parasites and invaders too large to be engulfed by phagocytic cells. Also function in allergic response
Respond rapidly during infection. Surround and engulf bacteria
Engulfs damaged tissue, bacteria and foreign debris. Act as antigen-presenters to T cells and B cells in the immune response
B lymphocyte (B cell)
White blood cell that matures in bone marrow and gives rise to antibody-producing plasma cells
T lymphocyte (T Cell)
Responsible for cell-mediated immunity, which depends on the action of several different T cells.
Natural Killer (NK) Cells
Lymphocyte that can recognize and kill cancer cells and virus-infected cells before the immune system is activated
Mast Cells
Immune cell that detects foreign substances in tissue spaces and releases histamine to initiate a local inflammatory response
Lymphatic System
System consisting of lymphatic vessels, lymph nodes and other tissues and organs. The lymphatic system returns excess fluid to the cardiovascular system and provides a site for immune surveillance.
Medulla Oblongata
Portion of brain stem that contains the center for controlling the cardiovascular system.
Bone marrow cell that gives rise to platelets. Replicates its DNA without dividing, making cells many times larger than other cells.
Parasympathetic Nervous System
Division of autonomic nervous system that promotes activities associated with rest.
The fluid (noncellular) portion of blood. Mostly water with ions, proteins and substances transported to cells
Cell fragments involved in clotting in response to wounding
Pukinje Fiber
Cardiac muscle fibers that conduct electrical signal in heart to apex of ventricles to initiate contraction
Sinoatrial (SA) Node
Specialized myocardial cells in wall of right atrium that initiate the heartbeat. The pacemaker of the heart
Stem Cell
Cells that have not yet differentiated. In bone marrow, are the source of all blood cells and platelets.
Sympathetic Nervous System
Division of autonomic nervous system that helps the body cope with stressors and with situations requiring high mental or physical activity
Leakage of plasma from capillaries into tissue spaces. Allows for movement of substances into tissues
Lower heart chambers. Pump blood into arteries for dispersion to lungs or rest of body tissues.