Question | Answer |
Red blood cells | biconcave cells in blood, lack nuclei when mature |
Iron | Included in hemoglobin molecules |
Homeostasis | equilibrium in the body
ex. stoppage of blood |
pericardium | tissue that forms loose-fitting sac around heart |
path of blood flow from vena cava to lungs (4) | right atrium, tricuspid valve, right ventricle, pulmonary semi-lunar valve |
bicuspid & tricuspid valves | close when ventricular walls contract |
ventricular systole | Blood pressure is high in systemic arteries (upper #) |
arteries | strong, elastic vessels that carry blood away from heart |
venules | cont. from capillaries to form veins, which carry blood back to atria |
coronary arteries | supplies blood to myocardium |
capillaries | blood vessels, thin enough to exchange gases between blood and tissue fluid |
what is blood | made up of platelets, red blood cells, white blood cells, plasma |
white blood cells | fight off foreign invaders |
pericardial cavity | fluid inside reduces friction (lubrication) |
heartbeat | we actually hear the valves closing in the heart |
pacemaker | sinoatrial node (S-A node) |
valves | contained in veins, allow blood to flow through, but block other things from flowing back |
Types of arteries | carotid, femoral, and aorta |
Types of veins | Jugular, renal vein, iliac vein, inferior vena cava |
What is the normal blood pressure | 115/75 |
blood pressure systolic | pressure during ventricular contraction (top # of blood pressure) |
blood pressure diastolic | ventricular relaxation (bottom # of blood pressure) |
Types of blood vessels | artery, arteriole, capillary, venule, veins |
What is the cardiovascular system | It is made up of heart, vessels, and blood |
What is the function of the cardiovascular system | Transports nutrients to tissues and transports waste from the tissue |