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20 Cards in this Set
- Front
- Back
Aorta vs Vein blood flow |
Aorta: 80mmHg
Veins: 0
blood pressure drops as it hits capillaries and remains low through veins |
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Biggest difference between veins and arteries |
Arteries carry blood away from heart Veins carry blood to heart
Arteries have elastin |
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term for pumping away from heart term for heart filling |
systole diastole |
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baroreceptors vs chemoreceptors |
baroreceptors: monitor blood pressure
chemoreceptors: monitor dissolved gasses (CO2) |
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what occurs in the capillaries |
all gas, nutrient and waste exchange |
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3 types of capillaries |
1. sinusoid: large particles in and out (whole blood cells) 2. fenestrated:large pores, large molecules 3. continuous: easy movement of small particles in and out |
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3 circulatory routes |
1. simplest (1 bed) 2. portal (2 beds) 3. arteriovenous anastomosis (shunt) - bypass bed |
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Collateral (alternative) Circulation |
Arteriovenous anastomosis (shunt) -artery empties into a vein -bypass exposed surfaces to directly service organs in cold weather |
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Where does gas exchange take place? |
alveolar - capillary region |
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Where are lobar arteries located? |
lungs (superior and inferior) - stem from the pulmonary artery |
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three functions of lymphatic system |
1. fluid recovery (for blood system) 2. immunity - picks up foreign material, destroys it in lymph nodes via lymph cells 3. Lipid absorption - from digestive to blood |
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lymphatic system is made up of (4) |
1. lymphatic organs 2. lymph 3. lymph vessels 4. lymph tissue (made of lymph cells) |
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Flow of Lymph |
1. LYMPHATIC CAPILLARIES: blind ends of lymph ducts in capillary bed 2. NODES: flows through lymph nodes for processing 3. COLLECTING DUCT 4. LYMPH TRUNK 5. Thoracic duct (whole body) OR lymphatic duct (URQ)
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Blocked lymph nodes can result in: |
Edema |
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Primary Lymph organs |
1. Bone marrow 2. thymus
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Secondary lymph organs |
1. spleen 2. tonsils |
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Functions of primary lymph organs |
1. bone marrow: produces and develops lymphocytes into b-lymphocytes
2. thymus: develops lymphocytes into t-lymphocytes |
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Functions of secondary lymph orgrans |
1.lymph nodes: only organ to filter lymph 2. spleen: red and white pulp 3. tonsils: palatine, lingual, pharyngeal - from nose and mouth. Crypts allow material to enter. |
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MALT |
Mucosa-associated-lymph-tissue (found in organs, ex of permanent lymph nodes developed from MALT is peyers patch in intestines) |
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Peyers Patch |
permanent lymph nodules developed from MALT at junction of small and large intestines |