(1) The outer layer of your skin, the epidermis, (PRODUCE)________ an oily substance (CALL)________ sebum – you can see it when you touch a mirror or a window; it's the oil you leave there.

(2) Sebum keeps water off your skin, but after a long period underwater, the sebum (WASH)________ off and the skin starts to absorb water.

(3) When you (IMMERSE)________ for a long time, dead cells in the outermost layer of your skin (which protects the body from the environment) absorb the water. (4) This causes this layer to expand and therefore have a greater surface area.

(5)(ATTACH)________ to the tissue below, it wrinkles (COMPENSATE)________ for the greater surface area.

(6) This outer skin layer is (THICK)________ on the palms of your hands and on the soles of your feet than on the other parts of your body, so absorbs more water here, making the wrinkling more noticeable.