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B2: Organization (The heart & blood vessels (veins (have valves to…
B2: Organization
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Human digestive system
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enzymes
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every enzyme has an active site with a unique shape that fits onto the substance involved in the reaction. each enzyme only catalyze one specific reaction
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bile is stored in gall bladder and is alkaline. alkaline conditions and large surface area increases the rate of breakdown of fat by lipase
health issues
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communicable= diseases that spread from person to person and are usually caused by fungi, bacteria and viruses. They are contagious
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plant organ systems
xylem
structure: 1 tube, is made of dead cells, strengthened with lignin, has gap
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phloem
structure= sieve plates, broken up, alive
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trasnpiration
transpiration= the movement of water from roots through xylem and out of the leaves through small pores on the underside of the leaf where it changes to vapor and is released
light intensity= the brighter light, the greater rate
temperature= the warmer it is, faster rate
air flow= better air flow around leaf, greater rate
humidity= drier the air around leaf, faster rate
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organization
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e.g. epithelial cell, epithelial tissue, stomach, digestive system
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cancer
benign tumor= growths of abnormal cells which are contained in 1 area- do not invade other parts of body
malignant tumor= growth of abnormal cells that invade neighboring tissue and spread to different parts of body causing secondary tumors
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