Activity 20.1 Identifying Blood Cells Blood consists of various blood cells and cell fragments (formed elements) suspend

[answerhappygod]

Activity 20 1 Identifying Blood Cells Blood Consists Of Various Blood Cells And Cell Fragments Formed Elements Suspend 1 (56.94 KiB) Viewed 12 times

Activity 20.1 Identifying Blood Cells Blood consists of various blood cells and cell fragments (formed elements) suspended in a flaid matrix (blood plasma). Plasma, which makes up 55 percent of total blood volume, is 90 percent water, but it also includes a wide variety of dissolved substances, including gases, nutrients, bormones, waste products, ions, and proteins. The formed elements make up the remaining 45 percent of total blood volume. Red blood cells (RBCs) or erythrocytes make up 99.9 percent of the formed elements. Thus, when you examine a normal human blood smear, the vast majority of the cells that you observe View a slide of a normal blood smear under low power with a compound light microscope. Almost all the cells that you see in. the field of view are the relatively small pink-staining red blood cells. As you scan the slide, identify white blood cells scattered among the red blood cells. a. How do the size and shape of a white blood cell compare to those of a red blood cell? b. Describe the shapes of the nuclei in white blood cells Blood smear will be red blood cells. Scan the slide carefully to locate the other formed elements white blood cells (WBC) and platelets Word Origins Erythrocyte is derived from two Greek words: erythros meaning "red," and kytor, meaning "cell" Thus, red blood cells are called erythrocytes. Leukocyte is also derived from Greek and means "white cell" (leukos means "white"), Co Scanned with CamScanner Platelets IN THE CLINIC LM 375 Blood Analysis The hematocrit is a value that records the percentage of whole blood that is composed of cells the formed elements). Because red blood cells make up the vast majority (99.9 percent of the formed elements, the hematocrit is used to measure RBC levels and assess oxygen-carrying capacity. The normal hematocrit range is 42 to 52 for men and 37 to 47 for women. Another diagnostic measure for oxygen-carrying capacity is hemoglobin (Hb) concentration in red blood cells. Hb concentration is measured in grams per deciliter (g/dLi Typically, a decline in hematocrit will also cause a decline in Hb concentration Normal Hb concentrations are 14 to 18 g/dL in men and 12 to 16 g/d in women Anemia is a condition characterized by a reduction in oxygen-carrying capacity and a resulting decline in oxygen transport to cells and tissues. Lower-than-normal hematocrit or Hb concentration is a warning sign for anemia.