Term
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Definition
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Term
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Definition
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Term
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Definition
| hole in the septum that connects the L & R sides of the heart in fetuses |
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Term
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Definition
| connection between aorta and pulmonary artery |
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Term
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Definition
| the pacemaker of the heart (controlled by brain) |
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Term
| Atrioventricular node (AV node) |
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Definition
| in the septum, 2nd point in conducting system of heart |
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Term
| Atrioventricular bundle (of HIS) |
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Definition
| 3rd step in conducting system of heart |
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Term
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Definition
| network of purkinje fibers spread myogenic signal from bundle of HIS |
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Term
| what percentage of blood goes to cornary arteries? |
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Definition
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Term
| function of coronary arteries |
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Definition
| branch out of ascending aorta into L & R coronary arteries carrying oxygenated blood to muscles of the heart. branches into smaller vessels providing blood to rest of heart. connected by collaterals. |
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Term
| function of cardiac veins |
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Definition
| carry deoxygenated blood back |
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Term
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Definition
| the amount of blood pumped out of the heart after one cardiac cycle |
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Term
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Definition
| total amount of blood that leaves the heart in one minute |
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Term
| 3 layers of veins & arteries |
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Definition
1. tunica intima
2. tunica media
3. tunica adventicia |
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Term
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Definition
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Term
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Definition
| water, gasses, nutrients, waste, hormones, etc. |
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Term
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Definition
- tx of gasses, nutrients, waste, hormones...
- defense mechanism
- prevention of blood loss
- controls body temp
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Term
| where are blood cells created? |
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Definition
| from pluripotent stem cells in red bone marrow |
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Term
| what hormone controls blood production? |
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Definition
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Term
| what organ secretes the hormone responsible for erythropoiesis? |
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Definition
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Term
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Definition
| process of red blood cell creation |
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Term
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Definition
- biconcave
- non-nucleated
- life span approx 120 days
- contains haemoglobin
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Term
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Definition
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Term
| what nutrients are required for cell maturation? |
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Definition
| vitamin B12 and folic acid |
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Term
| what is required for vitamin B12 absorption? |
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Definition
| intrinsic factor (in intesines) |
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Term
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Definition
| fall of oxygen levels in the blood |
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Term
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Definition
| destruction of erythrocytes |
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Term
| which cells are responsible for haemolysis? |
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Definition
phagocytic reticuloendothelial cells (in the liver, spleen and bone marrow)
AKA Kupffer cells |
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Term
| what happens to bilirubin after haemolysis? |
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Definition
| it is transported to the liver and excreted as part of bile |
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Term
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Definition
| neturophils, basophils, eosionphils |
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Term
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Definition
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Term
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Definition
- found in largest quantity
- part of pus
- irregular cells having a nucleus capable of phagocytic activity
- removal of pathogens & damaged cells
- diapedasis
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Term
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Definition
- increases in allergic reactions & parasitic infections
- counteracts histamine & reduces inflammatory reaction
- produces plasmin which dissolves fibrin
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Term
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Definition
- mast cells
- secretes histamine & heparin
- histamines increases diameter of blood vessels, increases blood flow to area
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Definition
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Definition
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Definition
- overall fxn is defense
- large phagocytic cells
- assists scar formation
- increased in microbial infection
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Term
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Definition
- formed in bone marrow, stored in lymph. sys.
- 2 types: T-lymphoctyes & B-Lymphocytes
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Term
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Definition
| blood cell involved in clotting |
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Term
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Definition
- vasoconstriction - platelets adhere to cell wall, release serotonin, constrict vessel
- platelet plug
- coagulation
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Term
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Definition
clotting factors + Ca + vit K ->
prothrombin -> thrombin ->
fibrinogen -> fibrin strands -> mesh
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