Textbook Question
Why is it important for a surgeon to choose—when possible—an incision pattern according to the skin's tension lines?
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Ch. 5 The Integumentary System
Martini, Nath, Bartholomew11th EditionFundamentals of Anatomy & PhysiologyISBN: 9780136874089
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Table of contents
- Ch. 1 An Introduction to Anatomy and Physiology26
- Ch. 2 The Chemical Level of Organization34
- Ch. 3 The Cellular Level of Organization30
- Ch. 4 The Tissue Level of Organization24
- Ch. 5 The Integumentary System17
- Ch. 6 Bones and Bone Structure36
- Ch. 7 The Axial Skeleton11
- Ch. 8 The Appendicular Skeleton17
- Ch. 9 Joints13
- Ch. 10 Muscle Tissue12
- Ch. 11 The Muscular System28
- Ch. 12 Nervous Tissue18
- Ch. 13 The Spinal Cord, Spinal Nerves, and Spinal Reflexes22
- Ch. 14 The Brain and Cranial Nerves20
- Ch. 15 Sensory Pathways and the Somatic Nervous System17
- Ch. 16 The Autonomic Nervous System and Higher-Order Functions30
- Ch. 17 The Special Senses16
- Ch. 18 The Endocrine System20
- Ch. 19 Blood31
- Ch. 20 The Heart31
- Ch. 21 Blood Vessels and Circulation29
- Ch. 22 The Lymphatic System and Immunity31
- Ch. 23 The Respiratory System12
- Ch. 24 The Digestive System18
- Ch. 26 The Urinary System31
- Ch. 27 Fluids & Electrolytes32
- Ch. 28 The Reproductive System12
- Ch. 29 Development and Inheritance23
Martini, Nath, Bartholomew11th EditionFundamentals of Anatomy & PhysiologyISBN: 9780136874089Not the one you use?Change textbook
Chapter 5, Problem 18
What two major layers constitute the dermis, and what components are in each layer?
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Identify the two major layers of the dermis: the papillary layer and the reticular layer.
Describe the papillary layer as the upper, thinner layer composed mainly of loose connective tissue, containing capillaries, sensory neurons, and dermal papillae that interlock with the epidermis.
Explain that the papillary layer contains components such as fibroblasts, mast cells, macrophages, and small blood vessels that nourish the epidermis.
Describe the reticular layer as the deeper, thicker layer made of dense irregular connective tissue, which provides strength and elasticity to the skin.
List the components of the reticular layer, including collagen and elastin fibers, larger blood vessels, lymph vessels, sweat glands, sebaceous glands, hair follicles, and deep pressure receptors.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Structure of the Dermis
The dermis is the thick layer of skin beneath the epidermis, providing strength and flexibility. It is primarily composed of connective tissue and supports various skin functions.
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The Dermis Example 1
Papillary Layer
The papillary layer is the upper, thinner part of the dermis made of loose connective tissue. It contains capillaries, sensory neurons, and dermal papillae that interlock with the epidermis, aiding nutrient exchange and sensation.
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4:36Introduction to Capillaries
Reticular Layer
The reticular layer is the deeper, thicker part of the dermis composed of dense irregular connective tissue. It houses collagen and elastin fibers, blood vessels, sweat glands, hair follicles, and nerve endings, providing strength and elasticity.
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02:31Epidermal Layers: Stratum Lucidum (Clear Layer)
Related Practice
Textbook Question
In which layer(s) of the epidermis does cell division occur?
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Textbook Question
List the four phases in the regeneration of the skin after an injury.
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Textbook Question
The cutaneous plexus and subpapillary plexus consist of
a. Blood vessels providing the dermal blood supply.
b. A network of nerves providing dermal sensations.
c. Specialized cells for cutaneous sensations.
d. Gland cells that release cutaneous secretions.
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Textbook Question
What widespread effects does epidermal growth factor (EGF) have on the integument?
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Textbook Question
In clinical practice, drugs can be delivered by diffusion across the skin. This delivery method is called transdermal administration. Why are fat-soluble drugs more suitable for transdermal administration than drugs that are water soluble?
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