Anatomy and Physiology Chapter 5
The Integumentary System With Latest
Updates
Functions of skin - ANSWER//Protection, Thermoregulation, Cutaneous Sensation,
Vitamin D synthesis, Blood Reservoir, Excretion and Absorption.
Protective elements of skin - ANSWER//Keratin, Lipids, Glandular Secretions, Melanin
Thermoregulation - ANSWER//Controls internal temp
Vitamin D synthesis - ANSWER//You need Vitamin D to absorb calcium
Epidermis - ANSWER//Superficial layer of skin. Avascular. 4 different cell types
(Keratinocytes, Melanocytes, Langerhans cells, merkel cells)
Keratinocytes - ANSWER//90% of cells. Keratin
Melanocytes - ANSWER//8% of cells. Melanin (Pigments and absorb uv radiation.
Langerhans Cells - ANSWER//Immune function
Merkel cells - ANSWER//Touch
Layers of skin (Superficial to deep) - ANSWER//Epidermis, Dermis
Epidermal Layers (deep to superficial) - ANSWER//Stratum Basale, Stratum spinosum,
Stratum granulosum, Stratum lucidum, Stratum corneum.
Stratum Basale - ANSWER//Keratinocytes, Melanocytes, Langerhans cells and Merkel
cells are here. Deepest layer, and mitosis occurs.
Stratum Spinosum - ANSWER//Keratinocytes and Langerhans cells are here.
Production of melanocytes here.
Stratum granulosum - ANSWER//Lamellar granules, apoptosis occurs here.
Stratum lucidum - ANSWER//Present only in thick skin
Stratum corneum - ANSWER//Keratin, and continuously shed (Outermost layer)
Dermis - ANSWER//Deep layer, Beneath epidermis, Vascular, LAyers: Papillary and
reticular
The Integumentary System With Latest
Updates
Functions of skin - ANSWER//Protection, Thermoregulation, Cutaneous Sensation,
Vitamin D synthesis, Blood Reservoir, Excretion and Absorption.
Protective elements of skin - ANSWER//Keratin, Lipids, Glandular Secretions, Melanin
Thermoregulation - ANSWER//Controls internal temp
Vitamin D synthesis - ANSWER//You need Vitamin D to absorb calcium
Epidermis - ANSWER//Superficial layer of skin. Avascular. 4 different cell types
(Keratinocytes, Melanocytes, Langerhans cells, merkel cells)
Keratinocytes - ANSWER//90% of cells. Keratin
Melanocytes - ANSWER//8% of cells. Melanin (Pigments and absorb uv radiation.
Langerhans Cells - ANSWER//Immune function
Merkel cells - ANSWER//Touch
Layers of skin (Superficial to deep) - ANSWER//Epidermis, Dermis
Epidermal Layers (deep to superficial) - ANSWER//Stratum Basale, Stratum spinosum,
Stratum granulosum, Stratum lucidum, Stratum corneum.
Stratum Basale - ANSWER//Keratinocytes, Melanocytes, Langerhans cells and Merkel
cells are here. Deepest layer, and mitosis occurs.
Stratum Spinosum - ANSWER//Keratinocytes and Langerhans cells are here.
Production of melanocytes here.
Stratum granulosum - ANSWER//Lamellar granules, apoptosis occurs here.
Stratum lucidum - ANSWER//Present only in thick skin
Stratum corneum - ANSWER//Keratin, and continuously shed (Outermost layer)
Dermis - ANSWER//Deep layer, Beneath epidermis, Vascular, LAyers: Papillary and
reticular
