Blood and its components
Blood - answersType of connective tissue consisting of plasma (approx. 46-63%) and formed elements
(approx. 47-54%).
Formed Elements - answersComposed of: Erythrocytes (red blood cells or RBC); Leukocytes (white blood cells
or WBC); Platelets
Erythrocytes - answersRed blood cells (RBCs). Sacs of hemoglobin molecules that transport the bulk of oxygen
carried in the blood. Contain at least 50 dif't surface antigens on their external surfaces. Have no organelles or
a nucleus and rely exclusively on fermentation to produce ATP.
Luekocytes - answersKnown as white blood cells (WBCs), there are five kinds in two groups: granulocytes &
agranulocytes
Granulocytes - answersLeukocytes characterized by the presence of granules in the cytoplasm. Three different
kinds.
Neutrophil - answersLeukocyte with a multi-lobed nucleus. Most prevalent leukocyte in the blood, composing
approximately 50-70% of leukocytes. They phagocytize bacteria in the blood.
Eosinophil - answersLeukocyte with bi-lobed nucleus and large, reddish cytoplasmic granules. Composes
approx. 2-4% of leukocytes in the blood. Play a role in countering parasitic worms and in allergies and asthma.
Basophil - answersLeast abundant leukocyte (approx. .5-1% of total). Large U/S shaped nucleus, but mostly
hidden by large coarse granules (usually appear purple) and about the size of a neutrophil. Mediates
inflammatory response and discharges several chemicals, including histamine, in response.
Agranulocyte - answersGroup of leukocytes (WBCs) that contain no obvious, visible granules. Found in the
bloodstream, but most abundant in lymphoid tissue.
Blood - answersType of connective tissue consisting of plasma (approx. 46-63%) and formed elements
(approx. 47-54%).
Formed Elements - answersComposed of: Erythrocytes (red blood cells or RBC); Leukocytes (white blood cells
or WBC); Platelets
Erythrocytes - answersRed blood cells (RBCs). Sacs of hemoglobin molecules that transport the bulk of oxygen
carried in the blood. Contain at least 50 dif't surface antigens on their external surfaces. Have no organelles or
a nucleus and rely exclusively on fermentation to produce ATP.
Luekocytes - answersKnown as white blood cells (WBCs), there are five kinds in two groups: granulocytes &
agranulocytes
Granulocytes - answersLeukocytes characterized by the presence of granules in the cytoplasm. Three different
kinds.
Neutrophil - answersLeukocyte with a multi-lobed nucleus. Most prevalent leukocyte in the blood, composing
approximately 50-70% of leukocytes. They phagocytize bacteria in the blood.
Eosinophil - answersLeukocyte with bi-lobed nucleus and large, reddish cytoplasmic granules. Composes
approx. 2-4% of leukocytes in the blood. Play a role in countering parasitic worms and in allergies and asthma.
Basophil - answersLeast abundant leukocyte (approx. .5-1% of total). Large U/S shaped nucleus, but mostly
hidden by large coarse granules (usually appear purple) and about the size of a neutrophil. Mediates
inflammatory response and discharges several chemicals, including histamine, in response.
Agranulocyte - answersGroup of leukocytes (WBCs) that contain no obvious, visible granules. Found in the
bloodstream, but most abundant in lymphoid tissue.
