Transcript What are Animals - River Dell Middle School

What are living things?
5 characteristic's that living thing share
1.
2.
3.
4.
5.
Made up of one or more cells
Respond to their environment
Use energy
Grow and mature
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/diversityof
life/vertebrates/