This lesson focuses on the diffusion of gas molecules across the cuticle membrane of sea spider legs and the role body size plays in the ability of sea spiders to uptake gases. Students construct model sea spider legs of varying diameters and use them to investigate the relationship between surface area-to-volume ratios and diffusion.
PolarTREC teacher Paula Dell accompanied researcher Kristin O’Brien’s team to Palmer Station in Antarctica for two
months in 2011 to conduct research on antarctic fishes. This article describes their expedition, their evolving collaboration and includes interviews with both Paula Dell and PolarTREC project manager, Janet Warburton.