CHE113SER2 - somewhere in your body-Platelets(thrombocytes...

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CHE113 Forensic Science Nicolas Canel Forensic Serology Red Blood Cells -Uniqueness of RBCs : –An RBC has a strange shape -- a biconcave disc that is round and flat, like a shallow bowl. –An RBC has no nucleus . The nucleus is extruded from the cell as it matures. –An RBC can change shape to an amazing extent, without breaking, as it squeezes single file through the capillaries. –An RBC contains hemoglobin , a molecule specially designed to hold oxygen and carry it to cells that need it. White Blood Cells and Platelets -White blood cells (WBCs, leukocytes) : –a part of the immune system and fight infection. –WBCs circulate in the blood to be transported to an infection site. –In a normal adult body there are 4,000 to 10,000 (average 7,000) WBCs per microliter (mm 3 ) of blood. –When the number of WBCs in your blood increases, it is a sign of an infection
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Unformatted text preview: somewhere in your body. -Platelets (thrombocytes) help blood to clot by forming a platelet plug , blood clots (through coagulation factors), or other blood clotting mechanisms. There are approximately 150,000 to 400,000 platelets in each microliter of blood (average is 250,000). Blood Clotting-Blood Clot Formation (blood cells, platelets, fibrin clot) Plasma-Plasma is a clear, yellowish fluid (the color of straw). Plasma can sometimes appear milky after a very fatty meal or when people have a high level of lipids in their blood. -Plasma is 90-percent water. The rest is protein. Blood Chemistry-Hemoglobin (basic unit in red blood cells) is a protein containing heme groups. Proteins are amino acids linked together (peptide bond) to form long chains. Proteins-In proteins, amino acids are linked by amide groups called the peptide bond;...
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