3D reconstruction from CT scans of a Kemp's ridley sea turtle (Lepidochelys kempii), or Atlantic ridley sea turtle is the rarest sea turtle and is critically endangered..." rel="shadowbox;height=800;width=1000">Kemp's Ridley Sea Turtle [2] (Lepidochelys kempii) demonstrating the orientation of the lungs and trachea relative to the surrounding skeleton and transparent soft tissues. Key structures visible in this animation are the lungs, trachea, The plastron is the nearly flat part of the shell structure of a turtle, what one would call the belly or ventral surface of the shell..." rel="shadowbox;height=800;width=1000">plastron [3], and The carapace is the dorsal (back), convex part of the shell structure of a turtle, consisting of the animal's ribcage combined with dermal bone..." rel="shadowbox;height=800;width=1000">carapace [4] (shell). Specimen courtesy of the International Fund for Animal Welfare (IFAW [5]).
Links:
[1] http://csi.whoi.edu/media/kempsridley3D
[2] http://en.wikipedia.org/wiki/Kemp%27s_ridley_sea_turtle
[3] http://en.wikipedia.org/wiki/Plastron#Plastron
[4] http://en.wikipedia.org/wiki/Carapace
[5] http://www.ifaw.org/united-states/our-work/animal-rescue
[6] http://csi.whoi.edu/videos