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IMG_0028 - by forming a plug at wound sites(X500 Platelets...

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Laboratory Atlas of Anatomy and Physiology, Sixth Edition ;{ l1{r.'; Histology 27 Siguner'B-ffi9i Erythrocytes (Red Blood Gellsl and Platelets Circulating erythrocytes are far more common than any of the leukocytes. Normally they have no nucleus but contain the red pigment hemoglobin, which permits them to transport oxygen and carbon dioxide throughout the body. Typically they assume the shape of a biconcave disk. Their diameter of about 7 microns is useful for comparing sizes of other histological structures. Platelets are cellular remnants of a much larger precursor. These remnants contain numerous chemicals, including those impoftant for clotting and inflammation. Platelets initiate blood clotting
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Unformatted text preview: by forming a plug at wound sites. (X500) Platelets Erythrocytes Figgunn'i-frffi Sickle Gell Anemia Genetic alteration of hemoglobin results in altered membrane structure and abnormal wavy or elongated, curvecl shape that often resembles a sickie. Oxygen.carrying capacity is much reduced. ( xs00) red blood cells Frgure 1-&7 Artery {A} and Vein (V} Blood vessels possess a tunica intima that lines the lumen, outside of which is a muscular tunica media, and a connective tissue covering, the tunica adventitia. The tunica media of arteries is typically much thicker than that of veins. ( x 100) Tunica adventitia Tunica media Tunica intima A...
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