🌟 [ 90 ] The Epidermis: Structure & Function The Epidermis: Structure & Function 0:33, The Epidermis: Structure & Function [ @ ]

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► CHAPTERS 🤓
00:00 Introduction to Skin Anatomy 🩺
00:04 The Three Major Layers of the Skin 🔬
00:33 The Epidermis: Structure & Function 🧬
01:53 The Dermis: Blood Supply & Sensory Role 🩹
03:00 The Hypodermis: Insulation & Shock Absorption ❄️
03:36 Key Cells of the Epidermis – Keratinocytes, Melanocytes & More 🏥
05:10 Understanding the Stratified Layers of the Epidermis 📚
07:00 The Role of Merkel & Langerhans Cells in Sensation & Immunity 🔍
08:12 Why Skin Anatomy Matters for Medical & Nursing Students 👩⚕️👨⚕️
09:00 Final Thoughts & Further Learning 🚀

► The human skin is the largest organ of the body, serving as a protective barrier, a sensory organ, and a key player in temperature regulation. Understanding the anatomy of the skin is essential for medical and nursing students, as it lays the foundation for dermatology, wound care, and systemic diseases affecting the skin.

This lecture breaks down the three main layers of the skin, their functions, and the key cellular components involved in maintaining skin integrity, immunity, and sensation.

🔍 The Three Main Layers of the Skin:

Epidermis – The outermost layer, composed of keratinocytes arranged in stratified squamous epithelium. It is avascular, meaning it relies on the dermis for nutrient exchange.
Dermis – The middle layer, containing blood vessels, nerve endings, connective tissue, collagen fibers, sweat glands, sebaceous glands, and hair follicles. This layer supports the epidermis and provides sensory input.
Hypodermis (Subcutaneous Fat) – The deepest layer, made of adipose tissue that acts as an insulator, shock absorber, and energy reserve.

💡 Key Cells Found in the Epidermis:

Keratinocytes – The primary structural cells of the skin, producing keratin, an essential protein for strength and protection.
Melanocytes – Cells responsible for melanin production, which protects against UV radiation and determines skin pigmentation.
Langerhans Cells – Immune system cells that detect pathogens and initiate immune responses.
Merkel Cells – Specialized cells involved in light touch sensation, connected to nerve endings in the dermis.

🩺 Stratified Layers of the Epidermis (From Deepest to Superficial):
1️⃣ Stratum Basale – The innermost layer, where new keratinocytes are continuously produced and begin their journey upward.
2️⃣ Stratum Spinosum – The thickest layer, containing desmosomes, which create a spiny appearance under a microscope.
3️⃣ Stratum Granulosum – Houses keratohyalin granules, essential for skin barrier function.
4️⃣ Stratum Lucidum (only in thick skin) – Found in areas like the palms and soles, providing an extra layer of protection.
5️⃣ Stratum Corneum – The outermost layer, made of dead keratinocytes, forming a protective shield against the environment.

🔬 Why Is Skin Anatomy Important in Medicine?

Understanding wound healing, skin diseases, and burn classification.
Recognizing epidermal vs. dermal injuries and their healing processes.
Learning how topical medications are absorbed and how they interact with the skin barrier.

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[ 90D ] The Epidermis: Structure & Function The Epidermis: Structure & Function 0:33, The Epidermis: Structure & Function Inside [6]

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Interesting Keyword >> TheEpidermisStructureFunctionTheEpidermisStructureFunction0 33 TheEpidermisStructureFunction

Layers of the Skin Explained – From Epidermis to Hypodermis 🔬

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🌟 [ 90 ] The Epidermis: Structure & Function The Epidermis: Structure & Function 0:33, The Epidermis: Structure & Function [ @ ]

Layers of the Skin Explained – From Epidermis to Hypodermis 🔬