A: Skin
B: Hypodermis - click on the bottom square and you can see the big white blobs of the adipose tissue - the skin does not contain adipose tissue, so this had to be the hypodermis.

Click on the top left square:
1a: Hair follicle
1b: Sebaceous glands

Click on the top right or middle squares:
2: Sweat glands

Click on the top right square:
a1: Epidermis
a2: Dermis - papillary layer
a3: Dermis - reticular layer

The protective layer or epidermis is very thin, so this skin covers your abdomen that needs less protection than the soles of your feets. If you have difficulties differentiating between thin and thick skins, go to parts 3 and 4 of the previous exercise (mini).