end show slide 1 of 34 copyright pearson prentice hall 37–2 blood and the lymphatic system
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37–2 Blood and the Lymphatic System
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37–2 Blood and the Lymphatic System
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Blood
Functions of blood:
Transport materials – O2,CO2,food,waste
Fight Diseases – WBC, antibodies
Clot – plateletes, plasma proteins
Maintain body temperature – water
Chemical balance – pH, osmosis
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37–2 Blood and the Lymphatic System
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Blood Cells
• red blood cells (RBC)
• white blood cells (WBC)
• platelets
Blood Cells
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37–2 Blood and the Lymphatic System
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Red Blood Cells:
Red blood cells transport oxygen (Hemoglobin).
They are produced in red bone marrow.
They have no nuclei.
They live for about 120 days.
5 million/cc
Blood Cells
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White Blood Cells
Fight off infections
Produced in bone marrow.
They contain nuclei.
7000/cc
Blood Cells
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Platelets and Blood Clotting
Blood clotting is made possible by plasma proteins and platelets.
Hemophilia is a genetic disorder that results from a defective protein in the clotting pathway.
Blood Cells
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37–2 Blood and the Lymphatic System
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Blood Cells
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37–2 Blood and the Lymphatic System
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Blood Cells
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37–2 Blood and the Lymphatic System
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Blood Cells
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Blood Plasma
The body has 10 pints of blood.
About 45% of blood volume is cells.
The other 55% is plasma—a straw-colored fluid.
Plasma is:
90% water
7% proteins
3% gases, salts, nutrients, hormones, wastes
Blood Plasma
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Blood Composition
Whole Blood Sample
Sample Placed in Centrifuge
Plasma
Platelets
White blood cells
Red blood cell
Blood Sample That Has Been Centrifuged
Blood Plasma
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Plasma proteins are divided into three groups:
• albumins - regulate osmotic pressure.
•globulins - fight viral and bacterial infections.
• fibrinogen – helps clot blood.
Blood Plasma
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37–2 Blood and the Lymphatic System
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The Lymphatic System:
The lymphatic system collects fluids lost by the blood and returns it.
The fluid is known as lymph.
Lymph nodes filter out diseases.
The Lymphatic System
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The Lymphatic System
The Lymphatic SystemSuperior vena cava
Thymus
Heart
Thoracic duct
Spleen
Lymph nodes
Lymph vessels
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Figure 10.14
Figure 10.14
figure 10-14.jpg
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The plasma protein that responsible for blood clotting is
a. albumin.
b. fibrinogen.
c. globulin.
d. hemoglobin.
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White blood cells that engulf and digest foreign cells are known as
a. phagocytes.
b. platelets.
c. antibodies.
d. thrombocytes.
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Blood cells that do not have nuclei and are produced by the red bone marrow are
a. red blood cells.
b. lymphocytes.
c. platelets.
d. phagocytes.
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The function of platelets is to
a. assist red blood cells in carrying oxygen.
b. destroy viruses and bacteria.
c. initiate the blood clotting process.
d. keep capillaries open so blood can flow freely through.
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The function of lymph nodes is to
a. trap bacteria and viruses that cause disease.
b. produce antibodies.
c. manufacture new red and white blood cells.
d. store fat.