Skin Diagram Quiz | 481 plays | Quizizz - Free Printable

This image is a detailed cross-sectional diagram of human skin, labeled with numbers from 1 to 17. The goal of the "Skin Diagram Quiz" is likely to identify each numbered structure in the skin. Let's go through each label and identify the corresponding anatomical structure based on standard human anatomy.

---

Skin Layers and Structures (Labeled)

Here’s a breakdown of each numbered part:

1. Epidermis – The outermost layer of the skin, composed of stratified squamous epithelium. It provides a waterproof barrier and creates our skin tone.

2. Stratum corneum – The topmost layer of the epidermis, made up of dead, flattened keratinocytes that are continuously shed and replaced.

3. Hair follicle – A sac-like structure in the dermis where hair grows from. It includes the root of the hair and associated structures like sebaceous glands.

4. Sebaceous gland – Glands that produce sebum (an oily substance) to lubricate the skin and hair. They open into the hair follicle.

5. Sweat gland (eccrine gland) – These glands produce sweat to help regulate body temperature. They are coiled tubular glands located deeper in the dermis and open directly onto the skin surface.

6. Arrector pili muscle – A small smooth muscle attached to the base of the hair follicle. When it contracts, it causes the hair to stand upright (goosebumps).

7. Dermis – The layer beneath the epidermis; contains connective tissue, blood vessels, nerves, hair follicles, and glands.

8. Hypodermis (Subcutaneous layer) – The deepest layer, composed mainly of adipose (fat) and loose connective tissue. It anchors the skin to underlying tissues and stores energy.

9. Adipose tissue (Fat cells) – Found in the hypodermis; insulates the body and cushions internal organs.

10. Hair shaft – The visible part of the hair above the skin surface.

11. Papilla of hair follicle – The bulb-like structure at the base of the hair follicle containing capillaries that nourish the growing hair.

12. Nerve ending (sensory receptor) – Sensory nerve endings in the skin detect touch, pressure, pain, and temperature.

13. Blood vessel (capillary network) – Blood vessels in the dermis supply nutrients and oxygen to skin cells and help regulate temperature.

14. Vein – A blood vessel carrying deoxygenated blood away from the skin.

15. Melanocyte – A cell in the epidermis that produces melanin, the pigment responsible for skin color and protection against UV radiation.

16. Hair – The visible filament extending from the hair follicle.

17. Basal layer (stratum basale) – The deepest layer of the epidermis, where new skin cells are produced through mitosis.

---

Summary Table:

| Number | Structure Name |
|--------|-----------------------------------|
| 1 | Epidermis |
| 2 | Stratum corneum |
| 3 | Hair follicle |
| 4 | Sebaceous gland |
| 5 | Sweat gland (eccrine) |
| 6 | Arrector pili muscle |
| 7 | Dermis |
| 8 | Hypodermis (subcutaneous layer) |
| 9 | Adipose tissue |
| 10 | Hair shaft |
| 11 | Papilla of hair follicle |
| 12 | Nerve ending |
| 13 | Blood vessel (capillary network) |
| 14 | Vein |
| 15 | Melanocyte |
| 16 | Hair |
| 17 | Basal layer (stratum basale) |

---

Key Functions Recap:

- Epidermis: Protection, waterproofing, pigment production.
- Dermis: Support, sensation, thermoregulation via blood vessels and glands.
- Hypodermis: Insulation, cushioning, fat storage.
- Hair follicles & glands: Thermoregulation, protection, sensory input.
- Nerves & blood vessels: Sensation and nutrient delivery.

This diagram is excellent for learning about integumentary system anatomy. If this is a quiz, you would match each number to its correct anatomical term as listed above.