Figures 8.3
Figures 8.3. Stylized tracheal system.
(a) Oxygen uptake through invagination. (b) Invagination closed, with tracheal gas exchange through gill. 1, indicates point of invagination of the tracheal system; 2, indicates point for oxygen uptake; 3, indicates poi nt for oxygen delivery, such as muscles. (After Pritchard et al. 1993)