2.3Cell SizeAP BiologyCell sizeThe surface area-to-volume ratioWhy SA:V ratio limits cell sizeWhy cells are smallAdaptations to overcome size constraintsComparing cell sizesMicroscopy and cell size••Mathematical practice: SA:V calculationsConnecting cell size to other topicsVocabularyUnit 2 topicsUnit 2 overview2.1Cell Structure: Subcellular Components2.2Cell Structure and Function2.3Cell Size2.4Plasma Membranes2.5Membrane Permeability2.6Membrane Transport2.7Facilitated Diffusion2.8Tonicity and Osmoregulation← Previous2.2 Cell Structure and FunctionNext →2.4 Plasma MembranesPractice AP Biology questions →