What are living things?
5 characteristic's that living thing share
1. Made up of one or more cells2. Respond to their environment3. Use energy4. Grow and mature5. Living things Reproduce
:Unicellular or Multicellular
• Multicellular animals have more than one cell
• Ex. Lion
• Unicellular organisms are made up of one cell• Ex. Paramecium
Multicellular Organisms
• Cells have specialized functions in a multicellular organism.
• Ex. Blood cell has a specific job to do. One job is to carry oxygen through out the body– Skin cell has a specific job to do they protect your
body
Respond to their environment
• Stimulus and Response
• Stimulus – A change that affects the activity of that organism
• Response – how the organism reacts
Stimulus and Response
• Stimulus- you are cold
• Response – Goose bumps on skin
homeostasis
• The maintenance of a stable internal environment
• Ex. Your body sweats when it gets too hot; sweating helps control your body temperature at a comfortable level.
Living Things
• Need energy to survive.• What are some ways organisms get their
energy?
Grow and mature
• Living things grow• Unicellular organisms grows by getting larger
and then dividing
• Multicellular organisms grow by increasing the number of cells and they get bigger
Reproduction
• animals reproduce • Sexual reproduction results in diverse
offspring. Two parents• What does this mean: diverse offspring?• Asexual reproduction – single parent produces
offspring whose genetic material is identical to its parent
What do living things need to survive?
• Almost all living things need:– water, – air, – food – a place to live
• Water is essential for life• Organisms often compete for food, water and
a place to live
Invertebrates
• Animals without a backbone.• Have no bones• Exoskeleton – external covering function is to
support the body• 95% of the animal population are
invertebrates!• Most reproduce Asexually
Invertebrates
• Jellyfish
• Flatworms, segmented worms
• Sponges
Vertebrates
• Contain a backbone• Endoskeleton – skeleton inside body• Vertebrae- protect part of the nervous system• Skull- protect brain vertebrates reproduce sexually
brainpop
• http://www.brainpop.com/science/diversityoflife/vertebrates/