Folds, wrinkles, etc! by folding the membrane of an organelle, surface area is optimized while volume remains the same. that is why mitochondria looks folded on the inside when you see pictures of it. the higher the surface area to volume ratio, the more efficient the organelle.
thrombocytopenia is a condition characterized by the formation of microthrombi occluding the microvasculature. The part of hemostasis which does not require platelets is the microvascolar arteries or blood vessels.