BSC 2085L Final Review( Complete Solution Rated A)

BSC 2085L Final Review Ex 19 and 20: The Blood and Heart 1. Know the composition of blood and what makes up the formed elements. a. Is rather a viscous substance that varies from bright scarlet to a dull red, depending on the amount of oxygen it is carrying b. 5.5L of blood in average adult c. Classified as a type of connective tissue because it consists of a nonliving fluid matrix (plasma) in which living cells (formed elements) are suspended d. Formed elements normally account for 45% of whole blood, plasma is remaining 55% e. 3 types of formed elements: i. Erythrocytes (RBCs) – sacs of hemoglobin molecules that transport O2 and small amount of CO2 ii. Leukocytes (WBCs) – part of the body’s nonspecific defenses and the immune system; contains nucleus iii. Platelets – function in blood clot formation (hemostasis) 2. What are characteristics of erythrocytes (RBCs); size, shape, function, anucleate and life span. Show Less