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Integumentary System. System Structures and Functions Skin Conditions and Treatments. Integumentary System. System Structures and Functions Skin Conditions and Treatments. Cutaneous Membrane. Cool facts about the …. Epidermis : outer most layer of your skin – has 5 stratums (sub-layers)
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Integumentary System System Structures and Functions Skin Conditions and Treatments
Integumentary System System Structures and Functions Skin Conditions and Treatments
Cool facts about the … • Epidermis: • outer most layer of your skin – has 5 stratums (sub-layers) • has no blood supply that’s why one can shave without much bleeding • top stratum is flaky – it is this that causes dandruff • bottom stratum has keratinocytes that produce keratin • make tough protective layer and/or corn • bottom stratum also has melanocytes that produce melanin • yellow, brown to black (more melanin = darker skin) • sunlight stimulates the production of melaninto protect DNA • from being damaged by sunlight • freckles and moles show where there is high amount of melanin
Cool facts about the … • Dermis: • inner layer of your skin – has 2 main sub-layers • sensitive part of your skin: has oil, nerves, sweat glands etc. • long and stretchy to protect your internal organelles • animal dermis is used to make leather goods • dermal papillae: make whorl ridges and loops on your hand/feet to • increase friction and gripping ability • tips of your fingers have sweat pores which mark the dermal papillae • pattern to give you your fingerprint on anything you touch
Cool facts about the … • Moods of Skin Colours: • Redness (erythema): embarrassment (blushing), fever, inflammation • or allergy – high blood pressure • Pallor (blanching): fear, anger or sick – low blood pressure • Yellow (jaundice): liver problem – too much bile circulating • Black-and-blue (bruising): blood clotting
Cool facts about the … • Sebaceous Gland – skin nightmare?? • Oil glands found everywhere except on the palm of hands and feet • it keeps skin soft and moist • it protects hair from becoming brittle • the oil has chemicals that can also kill bacteria ACNE Whiteheads = blocked sebaceous gland duct Blackheads = oxidized whiteheads When the gland gets infected
Cool facts about the … • Sweat glands: • they are found everywhere • heat regulator to keep your body within normal temperature (37 C) • sweat: water + salt + metabolic wastes (eg. urea, uric acid pee ew) • Hair: • made up of protein, has some keratin in it • is a hollow tube