Transcript Life Processes/Life Functions

LIFE PROCESSES
NUTRITION
• How an organism obtains and processes food
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The food is then used to make energy
Ingest-take food in
Digest-break down food
Egest-get rid of undigested material
• Autotrophic Nutrition
– Organism makes its own food
• Ex. A plant, carrying out photosynthesis
• Heterotrophic Nutrition
– Organism is a consumer and “eats” other organisms
• Ex. All animals, fungi, amoeba and paramecium
TRANSPORT
• Absorption (materials are taken in) and
circulation (materials move around) of
materials within an organism
– Can be inside a cell or inside the body
– Materials such as
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Oxygen
Water
Carbon Dioxide
Food
CELLULAR RESPIRATION
• Chemical process by which an organism
obtains ENERGY (ATP) from food
• Aerobic Respiration
– Uses oxygen to release energy from food
• Anaerobic Respiration
– Does NOT use oxygen to release energy from
food
SYNTHESIS
• Chemically combining simple substances
to form a more complex substance.
– Ex. Simple sugars bond to form complex
sugars.
REGULATION
• Control and coordination of activities in the
body.
– The Brain
– The Nervous System and Endocrine Systems
help maintain
EXCRETION
• Getting rid of metabolic wastes
– Ex. Carbon dioxide, excess salts and water
GROWTH & REPRODUCTION
• Growth
– To increase in cell size or number of cells
• Reproduction
– Making new organisms
• Asexually: 1 “parent”
– Ex. Single celled organisms
• Sexually: 2 “parents”
– Ex. Mammals, flowering plants
IMPORTANT NOTE: A single organism
DOES NOT have to reproduce to survive!
METABOLISM
• All of the chemical reactions in an
organism that help to maintain
homeostasis.
ALL LIVING THINGS:
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Are made of cells
Evolve
Require ENERGY
Require water
Maintain homeostasis in a changing
environment
• React and Respond to changes in the
environment
• Get rid of metabolic wastes
• Interact with the environment and with other
organisms