Uploaded January 2026 | Updated September 2026, 3 weeks ago
Skin Anatomy | Integumentary System (Special Senses)
In this video I break down the entire integumentary system step-by-step, covering skin layers, surface patterns, glands, hair, nails, and the breast as a modified skin gland.
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Content:
00:00 Introduction & Content
01:20 What is the Integument?
02:19 Function 1: Protection
03:14 Function 2: Thermoregulation
03:56 Function 3: Excretion & Barrier For Water
04:38 Function 4: Immunity
05:24 Function 5: Vitamin D metabolism
06:32 Function 6: Sensation and Communication
07:11 Surface Patterns of the Skin
10:47 Layers of the Skin
11:18 Epidermis
15:26 Dermis
17:26 Hypodermis
18:29 Appendages of the Skin
18:57 Sweat Glands
22:25 Hair
24:08 Nail
25:56 Breast (Mammary Glands)
28:48 Ending
What is the integument?
• Skin, hair (pilus), nails (unguis), eccrine sweat glands (glandulae sudoriferae eccrinae), apocrine sweat glands (glandulae sudoriferae apocrinae), sebaceous glands (glandulae sebaceae), mammary glands (glandulae mammariae)
• Functions: protection, thermoregulation, water balance, immunity, vitamin D production, sensory input
Surface patterns
• Skin sulci and skin areas
• Tension lines / Langer’s lines (lineae tensionis)
• Dermal / papillary ridges (cristae dermales)
• Fingerprints, palm ridges, tactile elevations
• Flexion creases, wrinkles, collagen-fiber orientation patterns
Layers of the skin
Epidermis (epidermis)
• Stratified squamous keratinised epithelium
• Stratum basale: keratinocytes, melanocytes, Merkel cells (cellulae tactus Merkel)
• Stratum spinosum: desmosomes, Langerhans cells (cellulae dendriticae)
• Stratum granulosum: keratohyalin granules, lamellar lipids
• Stratum lucidum (thick skin)
• Stratum corneum + stratum disjunctum: keratinised barrier
• Keratinocyte maturation and cornification cycle
Dermis (corium)
• Papillary layer (stratum papillare): dermal papillae, capillary loops, Meissner corpuscles (corpuscula tactus Meissner)
• Reticular layer (stratum reticulare): collagen bundles, elastic fibers, deep receptors, glandular components, follicle roots
• Provides tensile strength, elasticity, vascular supply for epidermis
Hypodermis (tela subcutanea)
• Adipose tissue for insulation, shock absorption, energy storage
• Skin ligaments (retinacula cutis) anchoring skin
• Subcutaneous bursae (bursae subcutaneae) over bony areas
Eccrine sweat glands
• Simple coiled tubular glands opening directly on the surface
• Secretory coil in dermis/hypodermis; duct to pore
• Produce watery sweat for thermoregulation and electrolyte balance
Apocrine sweat glands
• Large coiled glands emptying into hair follicles
• Viscous secretion activated at puberty
• Adrenergic sympathetic control; major contributor to body odor
• Modified apocrine glands: areolar glands (glandulae areolares), ceruminous glands (glandulae ceruminosae), ciliary glands (glandulae ciliares), mammary gland precursors
Sebaceous glands
• Holocrine secretion of sebum
• Associated with hair follicles or opening directly to skin
• Lipid-rich secretion; acne and comedone formation when ducts obstruct
Hair (pilus)
• Hair follicle (folliculus pili)
• Hair bulb (bulbus pili), dermal papilla (papilla pili), hair matrix
• Hair root, shaft, cortex, medulla
• Arrector pili muscle (m. arrector pili): sympathetic contraction → goosebumps
• Keratinisation pattern and pigmentation within cortex and medulla
Nails (ungues)
• Nail plate (lamina unguis), nail root, nail matrix (matrix unguis)
• Lunule (lunula), nail bed, proximal and lateral nail folds
• Eponychium and hyponychium
• Transparent plate over vascular bed enabling perfusion assessment
Breast as modified integument
• Areola and nipple (papilla mammaria)
• Areolar glands (glandulae areolares)
• Mammary gland lobes (lobi), lobules, alveoli
• Myoepithelial cells aiding milk ejection
• Lactiferous ducts (ductus lactiferi) and lactiferous sinuses
• Suspensory ligaments (ligamenta suspensoria mammae / Cooper’s ligaments) supporting breast; traction causes skin dimpling
Sources: Memorix Anatomy, Gray’s Anatomy, Histology textbooks, HistologyGuide
Programs used: Complete Anatomy, PowerPoint, Biorender
Skin Anatomy | Integumentary System (Special Senses)
In this video I break down the entire integumentary system step-by-step, covering skin layers, surface patterns, glands, hair, nails, and the breast as a modified skin gland.
🌐Website: taimtalksmed.com
🫀 Help keep this content free: youtube.com/channel/UCEr7pkSXVsHcBLLBcJAGV-Q/join
🔬Get 10% off anatomy lab models (affiliate link): https://anatomywarehouse.com?aff=34
📲Other Links:
Instagram: instagram.com/taimtalksmed
Discord: discord.com/invite/DENMUpS8ey
Content:
00:00 Introduction & Content
01:20 What is the Integument?
02:19 Function 1: Protection
03:14 Function 2: Thermoregulation
03:56 Function 3: Excretion & Barrier For Water
04:38 Function 4: Immunity
05:24 Function 5: Vitamin D metabolism
06:32 Function 6: Sensation and Communication
07:11 Surface Patterns of the Skin
10:47 Layers of the Skin
11:18 Epidermis
15:26 Dermis
17:26 Hypodermis
18:29 Appendages of the Skin
18:57 Sweat Glands
22:25 Hair
24:08 Nail
25:56 Breast (Mammary Glands)
28:48 Ending
What is the integument?
• Skin, hair (pilus), nails (unguis), eccrine sweat glands (glandulae sudoriferae eccrinae), apocrine sweat glands (glandulae sudoriferae apocrinae), sebaceous glands (glandulae sebaceae), mammary glands (glandulae mammariae)
• Functions: protection, thermoregulation, water balance, immunity, vitamin D production, sensory input
Surface patterns
• Skin sulci and skin areas
• Tension lines / Langer’s lines (lineae tensionis)
• Dermal / papillary ridges (cristae dermales)
• Fingerprints, palm ridges, tactile elevations
• Flexion creases, wrinkles, collagen-fiber orientation patterns
Layers of the skin
Epidermis (epidermis)
• Stratified squamous keratinised epithelium
• Stratum basale: keratinocytes, melanocytes, Merkel cells (cellulae tactus Merkel)
• Stratum spinosum: desmosomes, Langerhans cells (cellulae dendriticae)
• Stratum granulosum: keratohyalin granules, lamellar lipids
• Stratum lucidum (thick skin)
• Stratum corneum + stratum disjunctum: keratinised barrier
• Keratinocyte maturation and cornification cycle
Dermis (corium)
• Papillary layer (stratum papillare): dermal papillae, capillary loops, Meissner corpuscles (corpuscula tactus Meissner)
• Reticular layer (stratum reticulare): collagen bundles, elastic fibers, deep receptors, glandular components, follicle roots
• Provides tensile strength, elasticity, vascular supply for epidermis
Hypodermis (tela subcutanea)
• Adipose tissue for insulation, shock absorption, energy storage
• Skin ligaments (retinacula cutis) anchoring skin
• Subcutaneous bursae (bursae subcutaneae) over bony areas
Eccrine sweat glands
• Simple coiled tubular glands opening directly on the surface
• Secretory coil in dermis/hypodermis; duct to pore
• Produce watery sweat for thermoregulation and electrolyte balance
Apocrine sweat glands
• Large coiled glands emptying into hair follicles
• Viscous secretion activated at puberty
• Adrenergic sympathetic control; major contributor to body odor
• Modified apocrine glands: areolar glands (glandulae areolares), ceruminous glands (glandulae ceruminosae), ciliary glands (glandulae ciliares), mammary gland precursors
Sebaceous glands
• Holocrine secretion of sebum
• Associated with hair follicles or opening directly to skin
• Lipid-rich secretion; acne and comedone formation when ducts obstruct
Hair (pilus)
• Hair follicle (folliculus pili)
• Hair bulb (bulbus pili), dermal papilla (papilla pili), hair matrix
• Hair root, shaft, cortex, medulla
• Arrector pili muscle (m. arrector pili): sympathetic contraction → goosebumps
• Keratinisation pattern and pigmentation within cortex and medulla
Nails (ungues)
• Nail plate (lamina unguis), nail root, nail matrix (matrix unguis)
• Lunule (lunula), nail bed, proximal and lateral nail folds
• Eponychium and hyponychium
• Transparent plate over vascular bed enabling perfusion assessment
Breast as modified integument
• Areola and nipple (papilla mammaria)
• Areolar glands (glandulae areolares)
• Mammary gland lobes (lobi), lobules, alveoli
• Myoepithelial cells aiding milk ejection
• Lactiferous ducts (ductus lactiferi) and lactiferous sinuses
• Suspensory ligaments (ligamenta suspensoria mammae / Cooper’s ligaments) supporting breast; traction causes skin dimpling
Sources: Memorix Anatomy, Gray’s Anatomy, Histology textbooks, HistologyGuide
Programs used: Complete Anatomy, PowerPoint, Biorender
![[REMADE] Muscles of the Hip and Thigh [Groups, Origin, Insertion, Function] - Anatomy (old version)](https://i.ytimg.com/vi/CMMQQjVTdXQ/mqdefault.jpg "[REMADE] Muscles of the Hip and Thigh [Groups, Origin, Insertion, Function] - Anatomy (old version)
New musculoskeletal system videos: https://www.youtube.com/playlist?list=PLmzZnYRTmRK-lOBP-LFLRmuxGqwFCGIY0
Content:
Introduction 0:00
Anterior Pelvic Muscles: 0:33
Posterior Pelvic Muscles: 2:29
Anterior Muscles of the Thigh: 10:55
Medial Muscles of the Thigh: 14:43
Posterior Muscles of the Thigh: 18:21
Muscles of the Pelvic Girdle
Anterior Pelvic Muscles
- Musculus Iliopsoas
o Musculus Iliacus
Origin: Fossa Iliaca
Insertion: Trocheanter Minor
o Musculus Psoas Major
Origin: T12-L5
Insertion: Trocheanter Minor
- Musculus Psoas Minor
o Origin: T12-L1
o Insertion: Eminencia Iliopubica
Posterior Pelvic Muscles
- Gluteus Maximus
o Origin: Fascies Glutea, Posterior surface of sacrum and coccyges, Ligamentum Sacrotuberale, Fascia thoracolumbaris
o Insertion: Tuberositas glutea, tractus iliotibialis
- Gluteus Medius
o Origin: Fascies Glutea
o Insertion: Trocheanter Major
- Gluteus Minimus
o Origin: Fascies Glutea
o Insertion: Trocheanter Major
- Tensor Fasciae Latae
o Origin: Spina Iliaca Anterior Superior
o Insertion: Tractus Iliotibialis
- Piriformis
o Origin: Anterior surface of sactum
o Insertion: Trocheanter Major
- Obturator Internus
o Origin: Inner surface of obturator membrane
o Insertion: Fossa Trochanterica
- Obturator Externus
o Origin: External Surface of Obturator Membrane
o Insertion: Fossa Trochanterica
- Gemellus Superior/Inferior
o Musculus Gemellus Superior origin: Spina Ichiadica
o Musculus Gemellus Inferior origin: Tuber ischiadicum
o Common Insertion: Fossa trochanterica
- Musculus Quadratus femoris
o Origin: Tuber Ichiadicum
o Insertion: Crista Intertuberale
Anterior muscles of the Thigh
- Musculus Quadriceps
o Musculus Rectus Femoris Origin: Spina Iliaca Anterior inferior
o Musculus Vastus Medialis Origin: Linea Aspera
o Musculus Vastus Lateralis Origin: Linea aspera, Trocheanter Major, Linea Intertrochanterica
o Common Insertion: Ligamentum Patella to Tuberositas Tibia
- Musculus Sartorius
o Origin: Spina Iliaca Anterior Superior
o Insertion: Tuberositas Tibia
Medial Muscles of the Thigh:
- Musculus Pectineus
o Origin: Rammus Superior and Pecten osis pubis
o Insertion: Linea Pectinea Femoris
- Musculus Adductor Brecis, Longus, Magnus
o Brevis Origin: Rammus Inferior Ossis Pubis
o Longus Origin: Rammus Superior Ossis Pubus
o Magnus Origin: Ramus inferior ossis pubis, Ramus ossis ichii and tuber ichiadicum
o Common Insertion: Linea Aspera (Labrum mediale) but Magnus Epicondylus medialis aswell
- Musculus Gracillis
o Origin: Rammus Inferior Ossis Pubis
o Insertion: Tuberositas Tibiae
Posterior muscles of the thigh
- Musculus Semitendinosus
o Origin: Tuber Ichiadicum
o Insertion: Tuberositas Tibiae
- Musculus Semimembranosus
o Origin: Tuber Ichiadicum
o Insertion: Condylus Medialis Tibiae
- Musculus Biceps Femoris
o Origin of Caput Longum: Tuber Ichiadicum
o Origin of Caput Breve: Labium Laterale Linea Asprea
o Common Insertion: Caput Fibula")
