Integument [skin]

• What are the layers of the skin

  Epidermis. Dermis. Subcutaneous tissue.
• Which layer of the skin is not vascularised

  The epidermis
• Where is adipose tissue found in the skin

  The subcutaneous layer
• Where are the nerves in the skin found

  in the dermis
• Where are the sweat and oil glands found

  in the dermis
• What are the functions of the skin

  Protection. Excretion. Thermoregulation. Synthesis of Vitamin D.
• What type of tissue is the epidermis made of

  Epithelial
• What type of tissue is the dermis

  connective
• Label the epidermis

  X.

  A) Stratum corneum

  B) Stratum lucidum

  C) Stratum granulosum

  D) Stratum spinosum

  E) Stratum basale

  
• what cells make up the stratum corneum

  Dead keratinocytes
• What cells make up the stratum granulosum

  These cells contain lamellar granules
• What are the cells of the stratum spinosum

  Keratinocytes. Langerhans. Merker. Tactile discs. Sensory neurons.
• What cells make up the stratum basale

  Melanocytes
• What are the roles of langerhan cels.

  To recognise and process microbes.
• What is the role of the tactile disc

  To connect a sensory neuron to the merkel cell.
• What is the role of keratinocytes

  Skin repair
• What is thin skin

  Lacks the stratum lucidum.

  Does not cover the palms and bottom of the feet.

  It has fewer sensory receptors
• What is thick skin

  Covers the palms and bottom of the feet.

  Lacks hair follicles, oil glands and arrector muscles.
• What type of cells make the epidermis

  Stratified squamous epithelium.

  they are produced in the stratum basale.
• What is the dermis made of

  Collagen and elastic fibres
• What is the role of the dermis

  To anchor the epidermis
• Where is the papillary region of the skin

  The top layer of the dermis
• Where is the reticular region of the skin

  The bottom layer of the dermis
• What are the accessory skin structures

  Hair. Sebaceous and sudoriferous glands. Nails.
• What is the sudoriferous gland

  Sweat glands
• What is the role of the sebaceous glands

  Secrete sebum.

  Lubricates the skin.

  Antibacterial properties.
• What are the types of sudoriferous glands

  Eccrine and apocrine.
• Describe eccrine sudoriferous glands

  Secrete onto the body surface to regulate temperature.
• Describe apocrine sudoriferous glands

  Secrete thick sweat into hair follicle ducts
• Describe the structure of nails

  Made of tightly packed keratinised cells
• What is responsble for sensing light pressure in the skin

  Meissners corpuslces
• Where are papillae in the skin

  In the dermis
• What is the most abundant type of cells in the epidermis

  Keratinocytes
• What do epidermis cells accumulate

  Keratin
• What cells allow skin to be water resistant

  Lamellar granules are found in the stratum granulosum of the epidermis.

  They secrete lipids.
• What do sebaceous glands associate with

  Hair follicles