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Blood Something that I still have a question about…

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Presentation on theme: "Blood Something that I still have a question about…"— Presentation transcript:

1 Blood Something that I still have a question about…

2 Hemoglobin Hemoglobin is the main component of red blood cellsHemoglobin is the main component of red blood cells It is composed of 4 polypeptide chains that are linked togetherIt is composed of 4 polypeptide chains that are linked together Each chain has an attached iron atomEach chain has an attached iron atom This is where oxygen bindsThis is where oxygen binds As red blood cells travel through the capillaries surrounding the lungs, they pick up oxygenAs red blood cells travel through the capillaries surrounding the lungs, they pick up oxygen

3 Platelets Platelets are formed by breaking off of a larger cell called a megakaryocyte They are 1/10 th to 1/20 th as abundant as RBC Plug up small tears in vessels and secrete chemical signals

4 Hematopoiesis Fetuses produce blood cells in the liver, after birth, production takes place in bone marrowFetuses produce blood cells in the liver, after birth, production takes place in bone marrow There are 2 types of bone marrowThere are 2 types of bone marrow Yellow and RedYellow and Red Yellow marrow makes blood cells in emergency situationsYellow marrow makes blood cells in emergency situations RBCs mature in bone marrow and enter the blood stream through capillaries that run all throughout connective tissue and fat cells within large bonesRBCs mature in bone marrow and enter the blood stream through capillaries that run all throughout connective tissue and fat cells within large bones

5 White Blood Cells There are 5 types of WBCsThere are 5 types of WBCs Phagocytes – engulf and destroy foreign cells or moleculesPhagocytes – engulf and destroy foreign cells or molecules Neutrophils – destroy bacteria (most abundant WBC)Neutrophils – destroy bacteria (most abundant WBC) Lymphocytes – act against specific molecules that induce a response (most important cell of our immune system)Lymphocytes – act against specific molecules that induce a response (most important cell of our immune system)

6 Blood Diseases Polycythemia – too many RBCPolycythemia – too many RBC Anemia – an oxygen depriving condition resulting from one of the following:Anemia – an oxygen depriving condition resulting from one of the following: Lack of cellsLack of cells Lack of hemoglobinLack of hemoglobin Lack of ironLack of iron Leukemia – cancer that results in uncontrolled proliferation of WBCs (they take over)Leukemia – cancer that results in uncontrolled proliferation of WBCs (they take over) Sickle cell –a genetic mutation that causes hemoglobin to crystallizeSickle cell –a genetic mutation that causes hemoglobin to crystallize

7 Sickle Cell

8 HIV/AIDS

9 Other questions Why do veins appear blue?Why do veins appear blue? Light has to penetrate your skin to illuminate blood, red and blue light have difference degrees of success doing so, blue is ultimately the color you perceiveLight has to penetrate your skin to illuminate blood, red and blue light have difference degrees of success doing so, blue is ultimately the color you perceive How much iron is there in blood?How much iron is there in blood? The American Red Cross says - approximately 250 mg per pintThe American Red Cross says - approximately 250 mg per pint What is the difference between regular blood and menstrual blood?What is the difference between regular blood and menstrual blood? None – menstrual blood has other things mixed into it (such as mucosal tissue and vaginal secretions)None – menstrual blood has other things mixed into it (such as mucosal tissue and vaginal secretions)


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