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Answer: c. Blood is composed of the formed elements and plasma. Plasma is the liquid portion of blood. The formed elements consist of the cells and cell fragments. The erythrocytes (red blood cells), platelets, and leukocytes (white blood cells) are all considered formed elements.eutrophil. d. Monocytes. e. Eosinophils. Answer: b. Basophils are the least abundant leukocyte. Leukocytes are the white blood cells. The order of frequency of the leukocytes is: neutrophil, lymphocyte, monocyte, eosinophil, basophil.
The five most abundant elements in Earth's crust by volume and listed here as a percentage of the total volume of the crust are:   # Oxygen--47%  # Silicon--28%  # Alum â¦ inum--8%  # Iron--5%  # Calcium--4%        . 62 people found this useful.Paul Jones. Rockhound.he most abundant element in the crust of Earth is oxygen; the most abundant metal is aluminum. The Earth's crust consists of the following elements and percentages: Oxygen- â¦ -47%Silicon--28%Aluminum--8%Iron--5%Calcium--4%Sodium--3%Potassium--3%Magnesium--2%Titanium--0.5%All others--. 9 people found this useful.