The greater omentum is composed of which membrane?

A. Altered oxygen-carrying capability of blood: RBCs (via hemoglobin) are the primary carriers of oxygen; too few (anemia) or dysfunctional RBCs reduce O₂ delivery, too many (polycythemia) can alter flow.
B. Altered ability to clot blood: clotting is primarily mediated by platelets and clotting factors, not by RBC count (RBCs can influence viscosity but are not the main clotting elements).
C. Altered ability to fight infection: fighting infection is mainly the role of leukocytes (WBCs), not RBCs.
D. Altered heart rate and contractility: significant changes in RBC number (especially anemia) can cause compensatory increases in heart rate and contractility to maintain oxygen delivery; polycythemia can also change cardiac workload.

A. Diapedesis (transmigration): the cell is shown squeezing through the vessel wall (leaving the bloodstream), which is diapedesis (also called extravasation).
B. Phagocytosis: phagocytosis is ingestion of particles/pathogens by a phagocyte; the image shows movement out of a vessel, not engulfment of material.
C. Chemotaxis: Incorrect (related but not the pictured action) -chemotaxis is directed movement toward chemical signals; a leukocyte may chemotax once in the tissue, but the image specifically shows the mechanical passage through the endothelium (diapedesis).
D. Margination/Rolling: margination/rolling are earlier steps along the endothelium where leukocytes slow and adhere; the image shows a cell already squeezing through the wall, which is the next step (diapedesis).