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Integumentary System

Integumentary System. Carly Gau. The skin and its associated structures (i.e. hair, feathers, claws, hooves, and glands.) Skin is made up of two distinct layers – the EPIDERMIS and DERMIS And is connected to underlying structures by the HYPODERMIS (subcutaneous layer).

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Integumentary System

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  1. Integumentary System CarlyGau

  2. The skin and its associated structures (i.e. hair, feathers, claws, hooves, and glands.) • Skin is made up of two distinct layers – the EPIDERMIS and DERMIS • And is connected to underlying structures by the HYPODERMIS (subcutaneous layer) What is the Integumentary system?

  3. Function: protection, waterproofing, protect against microbes and UV light • Is the surface layer and consists of stratified squamous epithelium 5 layers make up the epidermis: - Stratum Corneum (most outer) - Stratum Lucidum - Stratum Granulosum - Stratum Spinosum - Stratum Basale (most inner) The Epidermis

  4. Function: support, temperature regulation and contains sensory receptors • Layer of connective tissue (CT) between the epidermis and hypodermis which is rich in blood vessels and nerves • Superficial part of dermis is loose CT and deeper layer is dense irregular CT • Sweat and sebaceous glands present • The sensory receptors in the dermis detect change Dermis

  5. Layer of loose CT with abundant adipose cells • Also known as the subcutaneous layer • Adipose acts as an energy store & insulates • Bulb of hair & deep blood vessels located in this layer Function: provides support and insulation Watch a video demonstrating the layers of skin. Click here to follow the hyperlink Hypodermis

  6. Sweat Glands Sebaceous Glands • Glands associated with the hair follicle • Produces oily sebum which prevents drying and has antibacterial properties • Glands not associated with the hair follicle • Produce watery sweat which cools the body by evaporating Glands of the Integumentary System

  7. Hair: arrector pili muscle contracts -traps air in the hairforming an insulating layer • Surface Blood Vessels: brings blood to the surface for cooling • Deep Blood Vessels: takes blood away from surface for warming • Adipose tissue: insulates • Sweat Glands: sweat is brought to surface for evaporation • Sensory Receptors: detect temperature change There are 6 main skin structures involved in thermoregulation Skin and Temperature Regulation

  8. Calluses: thickened pads on plantar and palmar Nails & Hooves: modified claws which protects foot from friction and injury - horses Horns: core of bone from skull covered in keratin Scales: as seen in reptiles Claws: cats, tigers etc Feathers: keratinised structures seen in birds Specialised Keratinised Skin Structures

  9. consists of the skin and its associated structures • Skin consists of three main layers – the epidermis, dermis and hypodermis • The skin contains sweat glands and sebaceous glands which have differing functions • Skin and its structures have a vital role in temperature regulation of the body • the outer keratinised layer of skin can form specialized structures which generally have a protective function KEY POINTS of the Integumentary System

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