System of blood cardiovascular system Main types of blood vessels arteries veins capillaries Site of exchange between blood and tissue capillary bed What do capillaries converge into venules What do venules converge into veins In heart blood enters through `entry` and exits through `exit` entry: atria exit: ventricle Circulation where right side pumps oxygen poor and left side pumps oxygen rich double circulation Where does oxygen rich blood from lungs enter pulmonary veins Where does oxygen rich blood get pumped into aorta How does aorta connect to heart coronary arteries Vein where blood returns to heart vena cava Which vena cava is legs inferior One complete sequence of heart cardiac cycle `contraction` phase, `relaxation` phase contraction: systole relaxation: diastole Valves that separate atrium and ventrical AV Valve Valves that control blood flow to aorta and pulmonary artery semilunar Thing that sets rhythm of heart sinoatrial node Outer layer of veins and arteries made of what connective tissue Inner layer of veins and arteries smooth muscle elastic fibers When is arterial pressure highest systole Where is pressure and velocity lower veins Constriction of smooth muscle in arteries vasoconstriction Inducer of vasoconstriction endothelin Thing stopping backflow from gravity and stuff in veins valves Fluid that leaks from tissue into capillaries lymph Organs that filter lymph lymph nodes Hardening of arteries by fatty deposits and cholestorol artherosclerosis Thing that causes cholestorol to go in arteries LDL Name for high blood pressure hypertension Intersection of food and air pharynx Top of windpipe larynx Name for windpipe trachea Where does air go after trachea bronchi bronchioles Where is gas exchanged alveoli What is used to move particles from lungs into esophagus cilia mucus What coats alveoli surfactants `cell` makes up alveoli, type `a` makes surfactants and type `b` makes up wall of lungs cell: pneumocyte a: II b: I Type of breathing in mammals negative pressure breathing Volume of air breathed in tidal volume Thing that regulates breathing medulla What side of the heart is oxygen poor right Top part that receives blood atrium Bottom part that sends blood ventricle Cardiac cycle: `1` (atrium closed, ventricle open) `2` (atrium open, ventricle closed) `3` (both open) 1: swish 2: swish 3: whoosh What is on the left (artery or vein) artery What is inside of lung called thoracic cavity What does CO2 make in blood that is used to see if you need to breathe bicarbonate Parts of ECG: `A`, `between A and B, horizontal`, `between A and B, going down`, `spike in B` A: SA Node between A and B, horizontal: AV Node between A and B, going down: Bundle branches spike in B: Ventricles