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Assignment for lab.docx - Assignment for lab Ecercise 13 -...

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Assignment for labEcercise 13 - Blood or Vascular Tissue:Drawing - microscopic image of human blood smear seen under oil immersionobjective; all types of formed elements should be labeled including liquidcomponent.Under the drawing, make a description of the specimen.Human Blood Smear (OIO)Source of image: (Eroschenko, 2008)DescriptionA smear of human blood examined, illustrates the formed elements.Erythrocytes or red blood cells (1) are the most abundant elements and the easiestto identify. Erythrocytes are enucleated (without nucleus) and stain pink with eosin.They are uniform in size and measure approximately 7.5 µm in diameter, which isthe approximate size of capillaries. Erythrocytes can be used as a size reference forother cell typesSeveral leukocytes or white blood cells are visible in the blood smear.Leukocytes are subdivided into categories according to the shape of their nuclei,the absence or presence of cytoplasmic granules, and the staining affinities of thegranules. Two neutrophils (2, 4), one eosinophil (7) filled with red-pink granules, andone small lymphocyte (5) with a thin bluish cytoplasm are visible. Scattered amongthe blood cells are small, blue-staining fragments called platelets (3, 6)(Eroschenko, 2008).Questions:1. Why are red blood cells biconcave in shape?

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Term
Winter
Professor
Marvin Plata
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