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27 Cards in this Set
- Front
- Back
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organ |
-two or more tissues working towards same function |
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organ system |
-combination of organs that work together, carry out particular function |
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Integumentary system |
-protects body -receives sensory input -helps control temperature -synthesize vitamin D |
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Cardiovascular system |
-transports blood, nutrients, wastes, gases -defend against disease -help control temperature, pH, and fluid balance
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lymphatic and immune systems |
-helps control fluid balance -absorbs fats -defend against infectious disease
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digestive system |
-ingest food,digests food -absorbs nutrients -eliminate wastes |
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respiratory system |
-maintains breathing -exchanges gases at lungs and tissue -helps control pH |
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urinary system |
-excretes metabolic waste -helps control fluid balance -helps pH balance |
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Skeletal system |
-supports body -protects organs -helps move body -store minerals -produce blood cells
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muscular system |
-maintains posture -moves body and internal organs -produces heat |
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nervous system |
-receives sensory input -integrates and stores input -initiates motor output -helps coordinate organ systems |
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endocrine system |
-produce hormones -helps coordinate organ systems -respond to stress -helps regulate fluid and pH balance -helps regulate metabolism |
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reproductive system |
-produces gametes -transports gametes -produce sex hormones -nurtures and give birth to offspring in females |
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Integumentary system |
-includes skins and other accessory organs, hairs, mails, glands -protection against physical trauma, pathogens and water loss -helps regulate body temperature -sensory receptors, awareness of surroundings -synthesizes melanin and vit D |
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skin |
-two main regions, dermis and epidermis -under skin there is a subcutaneous layer between dermis and internal structures where fat is stored -important for homeostasis |
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epidermis |
-thin outermost layer of skin -made of stratified squamous epithelial tissue -uppermost cells are dead, filled with keratin, thus becoming water proof -langerhans cells -melanocytes -some cells convert cholesterol to vitamin D |
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-langerhans cells |
-type of white blood cell, macrophage, that helps fight pathogens |
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melanocytes |
-produce melanin which lends skin colour -protection from UV |
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homeostasis |
-ability to maintain relatively constant internal state -nervous and endocrine system key in homeostasis -changes from normal tolerance results in sickness or death |
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skin cancer |
-2/3 arise in epidermis, basal cell carcinoma is the most common and least deadly, melanoma is the most deadly and the least common -stay out of sun from 10-3 -protective clothing - |
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dermis |
-thick inner layer of the skin -dense fibrous connective tissue -elastic collagen fibers -contains blood vessels which provide nutrients -sensory receptors -glands |
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nails |
derived from epidermis for a protective covering |
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hair follicles |
derived from dermis, but hair grows from epidermis cells |
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oil glands |
associated with hair, produce sebum that lubricates hair and skin, also retards bacterial growth |
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sweat glands |
derived from dermis, helps regulate body temperature |
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negative feedback |
-primary mechanism for homeostasis -sensors detect change, then control center responds and sensor is deactivated -output of response dampens original stimulus
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positive feed back |
-mechanism for increasing change of internal environment in one direction -secreting oxytocin during birth to increase uterine contractions -can be harmful, fever rising too high
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