Exercise 29 BLOOD Photo: berco/pix/art/2000/red_blood_cells.jpg.
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Transcript of Exercise 29 BLOOD Photo: berco/pix/art/2000/red_blood_cells.jpg.
Exercise 29
BLOODPhoto: http://www.cti.dtu.dk/~berco/pix/art/2000/red_blood_cells.jpg
• Two major components of blood, average Two major components of blood, average %%
• Plasma--composition, functional Plasma--composition, functional importanceimportance
• Formed elements—cell types, %, Formed elements—cell types, %, functionsfunctions
• Cellular composition of blood, sickle cell Cellular composition of blood, sickle cell anemia, leukemiaanemia, leukemia
• ABO, Rh blood groups—donors, recipientsABO, Rh blood groups—donors, recipients
• Hematology testsHematology tests
• Anemia, polycythemia, leukopenia, Anemia, polycythemia, leukopenia, leukocytosis, leukemialeukocytosis, leukemia
ObjectivesObjectives
•Connective tissue—fibers apparent only Connective tissue—fibers apparent only when clottingwhen clotting
•Two major components Two major components
–Plasma (nonliving fluid matrix)Plasma (nonliving fluid matrix)•55%55%
–Living cells (formed elements) Living cells (formed elements) •45%45%
What is Blood?What is Blood?
•Composition variesComposition varies
•>90% water>90% water
•Salts & Electrolytes (Na, K, Ca, Mg, Cl, Salts & Electrolytes (Na, K, Ca, Mg, Cl, HCOHCO33))
•Proteins (albumin, fibrinogen, globulin)Proteins (albumin, fibrinogen, globulin)
•Transported in the blood:Transported in the blood:–Nutrients (glucose, fatty acids, amino acids, Nutrients (glucose, fatty acids, amino acids, vitamins)vitamins)
–Metabolic waste (urea, uric acid)Metabolic waste (urea, uric acid)
–Respiratory gases (ORespiratory gases (O22, CO, CO22))
–HormonesHormones
What is Plasma?What is Plasma?
•Transport all of those componentsTransport all of those components
•Regulate pH & ion composition of Regulate pH & ion composition of fluidsfluids
•Clotting proteins—injuriesClotting proteins—injuries
•Antibodies (immunoglobulins)Antibodies (immunoglobulins)
•Stabilization of body temperature Stabilization of body temperature (absorbs heat from active muscles, (absorbs heat from active muscles, redistributes or releases through redistributes or releases through skin)skin)
Why is it important?Why is it important?
Fig. 19-1
•Living cellsLiving cells
•Three typesThree types–Erythrocytes (red blood cells—RBCs)Erythrocytes (red blood cells—RBCs)
–Leukocytes (white blood cells—WBCs)Leukocytes (white blood cells—WBCs)
–Platelets Platelets
What are formed elements?What are formed elements?
0.10.1%%
99.999.9%%
Fig. 19-1
Erythrocytes (red blood cells—Erythrocytes (red blood cells—RBCs)RBCs)
•99.9% of formed 99.9% of formed elementselements
•Anucleate when Anucleate when maturemature
•Contain Contain hemoglobin (Hb--red hemoglobin (Hb--red pigment)pigment)
•Transport OTransport O22 and and COCO22
Fig. 19-2Fig. 19-2
Leukocytes (white blood cells—Leukocytes (white blood cells—WBCs)WBCs)
•<0.01% of formed elements<0.01% of formed elements
•Have nuclei, no HbHave nuclei, no Hb
•Defense against pathogensDefense against pathogens
•Remove toxins, wastes, damaged Remove toxins, wastes, damaged cellscells
•Several typesSeveral types–Granulocytes, AgranulocytesGranulocytes, Agranulocytes
GranulocytesGranulocytesFig. 19-2Fig. 19-2
•NeutrophilsNeutrophils50-70% of WBCs50-70% of WBCsGranules are Granules are “neutral”—hard to “neutral”—hard to stainstainMultiple lobes in Multiple lobes in nucleusnucleus
Nonspecific defensesNonspecific defenses11stst on site of injury on site of injurySpecialize in Specialize in phagocytizing marked phagocytizing marked bacteria (antibodies, bacteria (antibodies, complement proteins)complement proteins)
GranulocytesGranulocytesFig. 19-2Fig. 19-2 •EosinophilsEosinophils
2-4% of WBCs2-4% of WBCsGranules stain dark Granules stain dark with “eosin”with “eosin”Bilobed nucleusBilobed nucleus
Nonspecific defensesNonspecific defensesAttack objects w/ABs, Attack objects w/ABs, parasites, allergensparasites, allergensAlso reduce Also reduce inflammation at injury inflammation at injury sitessites
GranulocytesGranulocytesFig. 19-2Fig. 19-2 •BasophilsBasophils
<1% of WBCs<1% of WBCsGranules stain Granules stain purple/bluepurple/blueSmaller cells (neut/eosin)Smaller cells (neut/eosin)
Nonspecific defensesNonspecific defensesContain histamine & Contain histamine & heparinheparinRelease of these Release of these increases inflammation increases inflammation Attracts more basophils Attracts more basophils (& eosinophils) to area(& eosinophils) to area
AgranulocytesAgranulocytesFig. 19-2Fig. 19-2 •MonocytesMonocytes
<2-8% of WBCs<2-8% of WBCs~2x size of RBC~2x size of RBCnucleus oval-kidney nucleus oval-kidney shapedshaped
Nonspecific defensesNonspecific defensesPhagocytosis--Phagocytosis--macrophages in tissuesmacrophages in tissuesRelease chemicals to Release chemicals to attract neutrophils, attract neutrophils, monocytes, other monocytes, other phagocytic cells, phagocytic cells, fibroblasts (scar tissue)fibroblasts (scar tissue)
AgranulocytesAgranulocytesFig. 19-2Fig. 19-2
•LymphocytesLymphocytes<20-30% of WBCs<20-30% of WBCsLarge, round nucleus Large, round nucleus
SPECIFICSPECIFIC defenses defensesImmune response—direct Immune response—direct cell attack or antibodiescell attack or antibodiesT CellsT CellsB CellsB CellsNK (Natural Killer) CellsNK (Natural Killer) Cells
PlateletsPlatelets
Fig. 19-2Fig. 19-2
•Irregularly shaped, Irregularly shaped, smallsmallcell fragments in cell fragments in mammalsmammals
ClottingClotting
Anemia = low hematocrit or low Anemia = low hematocrit or low Hb levelHb level
• Hematocrit = % cells in whole Hematocrit = % cells in whole blood (normal 42-46%)blood (normal 42-46%)– Centrifuge the blood tubeCentrifuge the blood tube– PCV “packed cell volume”PCV “packed cell volume”– ↓ ↓ if dehydrated, internal if dehydrated, internal
bleeding, RBC problems…bleeding, RBC problems…
• Polycythemia= elevated Polycythemia= elevated hematocrithematocrit– Many types, often treatable but Many types, often treatable but
not curablenot curable– Can be bone marrow cancerCan be bone marrow cancer
Sickle-Cell AnemiaSickle-Cell Anemia
• Specific type of anemiaSpecific type of anemia• Caused by single genetic (amino acid) Caused by single genetic (amino acid)
mutation of Hb molecule (chains) mutation of Hb molecule (chains) shapeshape
• Defective Hb gives up some bound Defective Hb gives up some bound oxygenoxygen
• Causes cell to become stiff and Causes cell to become stiff and curved—sickled curved—sickled
• Makes RBC fragile, can get stuck in Makes RBC fragile, can get stuck in capillariescapillariesblockageblockageno oxygenno oxygen
Fig. 19-4
Sickle-Cell AnemiaSickle-Cell Anemia
• Leukopenia = inadequate #s of WBCsLeukopenia = inadequate #s of WBCs– Can be measles, typhoid fever, cirrhosis, TBCan be measles, typhoid fever, cirrhosis, TB
• Leukocytosis = excessive #s of WBCsLeukocytosis = excessive #s of WBCs– Slight is normal during bacterial or viral Slight is normal during bacterial or viral
infectioninfection– Can be metabolic disease, hemorrhage, Can be metabolic disease, hemorrhage,
poisoningpoisoning– Extreme usually indicates LEUKEMIAExtreme usually indicates LEUKEMIA
• Malignant disorder of lymphoid tissuesMalignant disorder of lymphoid tissues• Many types, treatment helps, often fatalMany types, treatment helps, often fatal
APPLICATIONS MANUAL HAS DETAILS OF EACHAPPLICATIONS MANUAL HAS DETAILS OF EACH
BLOOD TYPINGBLOOD TYPING
• ABO Blood typesABO Blood types– surface antigens surface antigens (can trigger (can trigger
immune response)immune response) on RBCs on RBCs
Type A has “A” antigensType A has “A” antigens
Type B has “B” antigensType B has “B” antigens
Type AB has bothType AB has both
Type O has neither Type O has neither
BLOOD TYPINGBLOOD TYPING
• Rh FactorsRh Factors– Rh surface antigens Rh surface antigens (can trigger (can trigger
immune response)immune response) on RBCs on RBCs
Rh positive has the surface Rh positive has the surface antigens antigens
Rh negative does notRh negative does not
• Combine the two:Combine the two:AA++ or A or A-- B B++ or B or B--
ABAB++ or AB or AB- - OO++ or O or O--
Fig. 19-8
Donors and RecipientsDonors and Recipients
• Your antibodies will attack Your antibodies will attack other blood types other blood types (transfusions)(transfusions)
• You’re Type A—you have You’re Type A—you have Antibodies against Type B Antibodies against Type B “anti-B antibodies”“anti-B antibodies”
• Type O—anti-A and anti-B Type O—anti-A and anti-B
Donors and RecipientsDonors and Recipients
• Rh negative person will Rh negative person will onlyonly have anti-Rh antibodies if have anti-Rh antibodies if previously exposedpreviously exposed– Transfusion, pregnancyTransfusion, pregnancy
Donors and RecipientsDonors and Recipients
• Test for cross-Test for cross-reactivity to reactivity to “type” the “type” the bloodblood
• Clumps if the Clumps if the sample has sample has those those antigensantigens
Sample Anti-A Anti-B Anti-Rh
A+
B+
AB+
O-
Fig. 19-8
Donors and RecipientsDonors and Recipients• Universal DonorUniversal Donor
Type OType O• Universal RecipientUniversal Recipient
Type ABType AB
WEBSITE:WEBSITE:http://
nobelprize.org/medicine/educational/landsteiner/
Hematology TestsHematology Tests
• Total WBC countTotal WBC count– TOTAL # cells per unit volume of TOTAL # cells per unit volume of
bloodblood• Differential “DIFF” WBC countDifferential “DIFF” WBC count
– Count the first 100, categorize into Count the first 100, categorize into types, %types, %
• Total RBC countTotal RBC count– TOTAL # cells per unit volume of TOTAL # cells per unit volume of
bloodblood
Hematology TestsHematology Tests
• Hematocrit/PCV Hematocrit/PCV – (centrifuge, % cells)(centrifuge, % cells)
• Hemoglobin: can be anemic with Hemoglobin: can be anemic with normal Hctnormal Hct– RBCs carry oxygen in blood from RBCs carry oxygen in blood from
lungs to tissueslungs to tissues– Measures oxygen carrying-capacityMeasures oxygen carrying-capacity