https://padlet.com/kpannu1/4r9kznqrb293faj8 en-us 2022-03-22 14:24:17 UTC 2022-03-24 14:11:45 UTC hello@padlet.com kpannu1 https://padlet.com/kpannu1/4r9kznqrb293faj8/wish/2107649056 2022-03-22 14:25:44 UTC https://padlet.com/kpannu1/4r9kznqrb293faj8/wish/2107649056 kpannu1 https://padlet.com/kpannu1/4r9kznqrb293faj8/wish/2107649535 2022-03-22 14:25:55 UTC https://padlet.com/kpannu1/4r9kznqrb293faj8/wish/2107649535 kpannu1 https://padlet.com/kpannu1/4r9kznqrb293faj8/wish/2107649926 Starts with SA (sinoatrial) node (aka the pacemaker) --> atria contracts --> blood sent into ventricles --> AV node activated --> signal sent down the bundle of His and into the purkinje fibers --> ventricles contract, sending blood to the rest of the body]]> 2022-03-22 14:26:05 UTC https://padlet.com/kpannu1/4r9kznqrb293faj8/wish/2107649926 kpannu1 https://padlet.com/kpannu1/4r9kznqrb293faj8/wish/2107650737 Monitors heart contraction

P wave- atrial depolarization (contraction)
QRS complex - atrial repolarization (relax), ventricular depolarization 
T wave- ventricular repolarization (relax) ]]> 2022-03-22 14:26:22 UTC https://padlet.com/kpannu1/4r9kznqrb293faj8/wish/2107650737 kpannu1 https://padlet.com/kpannu1/4r9kznqrb293faj8/wish/2107650903 Superior/inferior vena cava --> right atrium --> tricuspid valve --> right ventricle --> pulmonary semilunar valves --> pulmonary arteries --> lungs --> pulmonary veins --> left atrium --> bicuspid valve --> left ventricle --> aortic semilunar valve --> aorta --> body]]> 2022-03-22 14:26:27 UTC https://padlet.com/kpannu1/4r9kznqrb293faj8/wish/2107650903 kpannu1 https://padlet.com/kpannu1/4r9kznqrb293faj8/wish/2107651782 Starling's law: increase venous return/stretch/contraction = increase stroke volume

Cardiac output: CO = SV*HR
-SV (stroke volume)= volume by left ventricle in 1 beat
-HR (heart rate)= ventricular contractions (heart beats) per minute]]> 2022-03-22 14:26:48 UTC https://padlet.com/kpannu1/4r9kznqrb293faj8/wish/2107651782 kpannu1 https://padlet.com/kpannu1/4r9kznqrb293faj8/wish/2107652316 2022-03-22 14:27:00 UTC https://padlet.com/kpannu1/4r9kznqrb293faj8/wish/2107652316 kpannu1 https://padlet.com/kpannu1/4r9kznqrb293faj8/wish/2107652738 4 different components: plasma (helps transport of cells/material, consists of water, solutes, hormones, proteins, etc, makes up 55% of blood), leukocytes (WBC - immune response), erythrocytes (RBC- O2 transport), platelets 

Leukocytes: Granular (neutrophils - phagocytize bacteria, eosinophils - remove parasites, basophils - allergic reactions/allergies)
Agranular (lymphocytes - antibodies, monocytes - phagocytize sick cells, phagocytize toxic tissues (called macrophages once in tissue))  

Erythrocytes: biconcave, hemoglobin is the oxygen holding protein, anucleated, erythropoiesis (formation of RBCs) 

Platelets: refer to blood clotting]]> 2022-03-22 14:27:09 UTC https://padlet.com/kpannu1/4r9kznqrb293faj8/wish/2107652738 kpannu1 https://padlet.com/kpannu1/4r9kznqrb293faj8/wish/2107653153 Veins: carry blood to to heart, contain valves. closer to surface of body, usually carry deoxygenated blood (exception - pulmonary vein carries O2 blood)

Arteries: carry blood away from the heart, thicker muscle walls, usually oxygenated blood (exception - pulmonary artery carries non-O2 blood) ]]> 2022-03-22 14:27:19 UTC https://padlet.com/kpannu1/4r9kznqrb293faj8/wish/2107653153 kpannu1 https://padlet.com/kpannu1/4r9kznqrb293faj8/wish/2107653536 Systole/Diastole 
systole- higher pressure contraction by ventricles (sending blood to the body) 
diastole- lower pressure relaxation by ventricles 

BP is lower in veins (lowest in the vena cavas) than arteries ]]> 2022-03-22 14:27:28 UTC https://padlet.com/kpannu1/4r9kznqrb293faj8/wish/2107653536 kpannu1 https://padlet.com/kpannu1/4r9kznqrb293faj8/wish/2107653777 Vasoconstriction --> platelet plug forms --> release of clotting factors --> prothrombin converts into thrombin --> soluble fibrinogen converts into insoluble fibrin]]> 2022-03-22 14:27:34 UTC https://padlet.com/kpannu1/4r9kznqrb293faj8/wish/2107653777