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!

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/