CHE113SER1

CHE113SER1 - . 4 to 5 liters of blood for females. A 40...

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CHE113 Forensic Science Nicolas Canel Forensic Serology Two types of Blood Evidence ; Blood analysis (e.g., chemistry, typing, etc.) Pattern analysis •Blood: circulatory system and is continually being pumped. •The blood distributes oxygen and nutrients and removes CO 2 to lungs for exhalation, other waste to the kidneys and liver for processing and elimination. •Blood is a mixture of cells and plasma. •Plasma is the liquid portion of the blood containing electrolytes, nutrients, waste products, vitamins, hormones, clotting factors, and proteins such as albumin and immunoglobulins (antibodies to fight infection). •Cellular portion of blood: •red blood cells (RBCs), white blood cells (WBCs) and platelets. Blood cells like red blood cells float in the plasma. Blood Properties - Blood: Accounts for about 8 % of total body weight. 5 to 6 liters of blood for males
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Unformatted text preview: . 4 to 5 liters of blood for females. A 40 percent blood volume loss, internally or/and externally, is required to produce irreversible shock (death). A blood loss of 1.5 liters, internally or externally, is required to cause incapacitation. Blood-Many Components: Human Red Blood Cells (in red), Platelets (yellow) and T-lymphocyte (light green) [also contains waste products, enzymes, etc.]. Red Blood Cells-Red blood cells (RBCs, erythrocytes) : most abundant cells in the blood give it its characteristic red color. Average of 5,000,000 RBCs per cubic microliter (mm 3 ). RBCs account for 40 to 45 percent of the blood. The percentage of blood made up of RBCs is frequently measured and is called the hematocrit . The ratio of cells in normal blood is 600 RBCs for each white blood cell and 40 platelets....
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