Circulation Flashcards
Path of blood through heart?
- superior and inferior vena cava
- right atrium
- right ventricle
- pulmonary arteries
- lungs
- pulmonary veins
- left atrium
- left ventricle
- aorta
- body
Three portal systems?
-blood travels through an extra capillary bed before returning to the heart
- liver (hepatic)
- kidney
- brain (hypophyseal)
Foramen ovale in fetus?
connects right and left atria
Ductus arteriosus in fetus?
connects pulmonary artery to aorta, along with foramen ovale, shunts blood away from lungs
Ductus venosus in fetus?
connects umbilical vein to inferior vena cava, connecting umbilical circulation to central circulation
Plasma?
aqueous mix of nutrients, wastes, hormones, blood proteins, gases, salts
Erythrocytes (red blood cells) job?
carry oxygen
hemoglobin?
four subunits carry O2 and CO2, iron controls binding and releasing
What factors shift the hemoglobin curve right?
- increase temp
- Bohr effect (decrease pH, increase Pco2)
- O2 release to tissues enhanced when H+ allosterically binds to Hb, Pco2 increase leads to increase H+
Leukocytes?
WBCs, function in immunity
What are platelets for?
blood clotting
How do platelets work?
- platelets release thromboplastin, which (along with cofactors Ca 2+ and vita K) converts inactive prothrombin to active thrombin
- thrombin converts fibrinogen into fibrin, which surrounds blood cells to form the clot
Blood type A?
- antigen A
- anti B antibodies
- donates to A, AB
- receives from A, O
Blood type B?
- antigen B
- anti A antibodies
- donates to B, AB
- receives from B, O
Blood type AB?
- antigen A, B
- no antibodies
- donates to AB
- receives from all
