Integumentary system
Components of the integumentary system
General function
Cell types
Layers
Stem cells: Contained within the stratum basale, and can differentiate, meaning they can make different cells.
Melanocytes: Secretes and produces melanin which creates pigment.
Keratinocytes: A cell filled with a tough protein called keratin.
Tactile epithelia cells: Sensory cell sensitive to touch.
Dendritic cells: An immune cell that is mobile. It looks for "invaders" and starts the immune process.
Stratum granulosum: Cells contain granules that produce a glycolipid that waterproofs the skin.
Stratum lucidum:This layer is found only in thick skin.
Stratum spinosum: Spines between cells. Held together by desmosomes
Stratum basale: Most deep layer. Primary made up of stem cells.
Stratum corneum: Made up kof dead keratinocytes.
Epithelial tissue: Stratified squamous epithelium, and exocrine glands.
Muscle tissue: Erector pili, which makes your hairs stand up.
Connective tissue: Areolar connective tissue, and dense irregular connective tissue found in the dermis.
Nervous tissue: Sensory receptors, and nerve endings.
Cutaneous layer
Subcutaneous layer
Excretion of water and salts.
Produces vitamin D for which is need for calcium absorption.
Thermoregulation with blood vessels and sweat glands.
Sensory reception with special sensory cells.
Protection as a waterproof barrier. Protects against UV.
Fat storage
Loose connection to underlying muscle tissue
Insulation