If you wanted to draw a diagram of frog anatomy you might be surprised at how many parts there are in that little amphibian. Frogs live on land most of the time, but they are amphibians because they are born in the water, female frogs lay their eggs underwater, and they start their l...
Place a frog on a dissection tray. To determine thefrog’s sex, look at the hand digits, or fingers, on its forelegs. A male frog usually has thick pads on its “thumbs,” which is one external difference between the sexes, as shown in the diagram below. Male frogs are also usually...
A liquid bridge in the gap between the toe pad and the substrate can be formed by the secretion of mucus, by capillary condensation of water vapour, or by external surface wetting (e.g. rain droplets). The meniscus of this bridge can cause capillary contact forces (Fig.3A), arising from...