What are living things?

5 characteristic's that living thing share 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!

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/