system structures and functions skin conditions and treatments

Integumentary SystemSystem Structures and FunctionsSkin Conditions and Treatments

Cutaneous Membrane

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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 melanin to protect DNA from being damaged by sunlight freckles and moles show where there is high amount of melanin





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





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

Whiteheads = blocked sebaceous gland duct

Blackheads = oxidized whiteheads

ACNE

When the gland gets infected





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




system structures and functions skin conditions and treatments

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