Can you identify the picture?

[captpackrat]

Can you tell what these are (click for full size)

#1:  The side of a sole of a boot.
#2:  Inside of a microwave oven door.
#3:  Edge of a dog's nose.
#4:  A dog's paw pad.

Comments

[marko-the-rat.livejournal.com]

I think number 4 is a plant of some sort. A bit vague, but at least it helps to narrow it down.

[captpackrat.livejournal.com]

Nope, not a plant.