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Life Processes How do we know if something is alive? • The 8 characteristics of life. – (SEE ABOVE) • Now that we know what is living, what must organisms do to stay alive? – (SEE PAGE 15) • Life ProcessesAny activity or function that is necessary in order for life to continue. Synthesis • Creation of substances such as sugar and protein within the body that are essential for life • Photosynthesis, protein synthesis Transport • The movement of substances within the organism • Passive, active, circulation Excretion • Release of waste products from metabolism into the environment • Contractile vacuoles, excretory system, respiratory system, biogeochemical cycles Regulation • Maintaining internal balance, such as temperature and water • Homeostasis, water balance, endocrine system, nervous system, excretory system Nutrition • Obtaining food from the external environment for growth and development • Photosynthesis, food webs, digestive systems, predator/prey relationships Growth • Increase in cell size, or divide cells again and again • Development, metamorphosis, cell size – reason for dividing Reproduction • Production of new organism from two parents (sexually) or from a single parent (asexually) • Sexual/asexual, mitosis, meiosis, reproductive system Respiration • The use of oxygen to convert food into energy • Cell respiration, carbon cycle, respiratory system STERNGRR • A quick acronym for the life processes.