Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

5. Integumentary System

The Epidermis: Cells

Anatomy & Physiology

5. Integumentary System

The Epidermis: Cells

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2:15 minutes

Problem 9d

Textbook Question

Match the appropriate structure with the proper description and/or function.

4. Cause Fingerprints
a. Dermal papillae
b. Lamellar corpuscles
c. Dermis
d. Hair follicle
e. Epidermis
f. Eccrine sweat gland
g. Reticular layer
h. Sebaceous glands

Verified step by step guidance

Understand the anatomy of the skin and its layers: The skin consists of three main layers—epidermis, dermis, and hypodermis. The dermis is further divided into the papillary layer and the reticular layer. Fingerprints are formed by structures in the dermis, specifically the dermal papillae.

Learn the role of dermal papillae: Dermal papillae are small, finger-like projections in the papillary layer of the dermis. They interlock with the epidermis and create ridges on the skin's surface, which are responsible for fingerprints.

Differentiate dermal papillae from other structures: Lamellar corpuscles are sensory receptors for pressure, eccrine sweat glands produce sweat, sebaceous glands secrete oil, and the reticular layer provides strength and elasticity to the skin. None of these directly cause fingerprints.

Understand the relationship between dermal papillae and fingerprints: The ridges formed by dermal papillae are genetically determined and unique to each individual. These ridges are what create the patterns observed in fingerprints.

Match the correct structure: Based on the description and function, the structure responsible for causing fingerprints is 'a. dermal papillae'.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Dermal Papillae

Dermal papillae are small, nipple-like projections located at the junction of the dermis and epidermis. They play a crucial role in the formation of fingerprints by creating unique patterns on the skin's surface. These structures contain capillaries and nerve endings, contributing to the skin's sensitivity and nourishment.

Epidermis

The epidermis is the outermost layer of skin, providing a protective barrier against environmental factors. It is composed of keratinized cells and does not contain blood vessels. The epidermis is essential for the formation of skin features, including fingerprints, as it is where the patterns created by dermal papillae are expressed.

Dermis

The dermis is the layer of skin beneath the epidermis, consisting of connective tissue, blood vessels, and various structures such as hair follicles and glands. It supports the epidermis and houses the dermal papillae, which are responsible for the unique patterns of fingerprints. The dermis also plays a vital role in thermoregulation and sensation.