Blood_2012 - Bood Blood can be considered a specialized...

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Bood Blood can be considered a specialized type of connective tissue since blood is composed of cells embedded in a specialized extracellular matrix; furthermore, blood functions to maintain communication (connection) between all tissue and organs in the body. Total blood volume in adults ~ 6 liters or 7%-8% of body weight. Components of blood plasma – makes up ~55% of the total blood volume; composed of 90% water, 7% proteins (albumin is a major protein component that functions to maintain the osmotic pressure of blood), 2.1% amino acids, glucose, hormones, etc., and 0.9% inorganic salts; cells – erythrocytes (red blood cells), leukocytes (white blood cells), and platelets General functions of blood Blood functions to maintain cellular homeostasis: transports oxygen and nutrients to cells removal of CO 2 and waste from cells/tissues maintains acid-base balance; is a good buffering system medium for the transport of cells, hormones, clotting factors, etc transports cells and substances responsible for host’s defense mechanisms thermoregulation and coagulation Blood is the tissue most often examined for diagnostic purposes. The complete blood count (CBC) is often used as a broad screening test to determine an individual's general health status. It consists of a panel of tests that evaluates the types of cells that circulate in the blood and includes the following: A. Evaluation of white blood cells - the cells that are part of the body's defense system against infections and cancer and also play a role in HYPERLINK " " allergies and inflammation: HYPERLINK " " White blood cell (WBC) count is a count of the total number of white blood cells in a person's sample of blood. HYPERLINK " " White blood cell differential identifies and counts the number of the various types of white blood cells present. The five types include HYPERLINK " " neutrophils, HYPERLINK " " lymphocytes, HYPERLINK " " monocytes, HYPERLINK " " eosinophils, and HYPERLINK " " basophils.
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B. Evaluation of red blood cells - the cells that transport oxygen throughout the body: 1. HYPERLINK " " Red blood cell (RBC) count is a count of the actual number of red blood cells in a person's sample of blood. 2. HYPERLINK " " Hemoglobin (HGB) measures the amount of the oxygen-carrying protein in the blood. 3. HYPERLINK " " Hematocrit (HCT) measures the percentage of a person's blood that consists of red blood cells.
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