| A | B |
| 3 | # of layers skin has |
| Blood Vessels | The skin contains _ _ that aid in the regulation of body temperature |
| Dermis | True skin layer with nerve endings, providing sense of touch, heat and cold |
| Epidermis | Thin, outermost, cellular membrane layer |
| Glands | The skin contains _ that secrete fluids |
| Glands | Skin's accessory organs are: hair, nails & _ |
| Hair | Skin's accessory organs are: glands, nails & _ |
| Keratin | Protein found in the basal skin layer |
| Adipose layer | Fat layer |
| Melanocytes | Contain melanin that gives color to the skin |
| Nails | Skin's accessory organs are: hair, glands & _ |
| Nerve Fibres | Skin acts as a receptor for pain, temperature, pressure & touch through _ _ under the skin |
| Nerves | The skin contains _ that carry impulses |
| Protective Barrier | Skin provides a _ _ against bacteria |
| Skin | Outer covering of the body |
| Skin | Largest organ of the body |
| Subcutaneous layer | Thick, fat-containing underlying tissue |
| Subcutaneous layer | Adipose or fat cells found here connects dermis to muscles and organs below it, acting as heat insulator |
| Vitamin D | Skin aids in _ _ production via sunlight or ultraviolet radiation exposure |
| Waterproof | Skin provides a _ and germ-resistant covering |
| Erector muscle | Contracts to pull hairs vertical |
| Sebaceous glands | Produce oil or sebum |
| Flush | Appearance of skin when we are very hot |