Structure of an Animal

Cell: the basic unit of structure and function in living things.

Tissue: A group of similar cells that perform a specific function.

Organ: A group of several different tissues.

• Organ System: A group of organs working together.

• Organism: Any living Thing!

Functions of Animals• obtain food & oxygen

• keep internal conditions stable

• Move

• Reproduce

Adaptations

• Adaptations: Structures or behaviors that allow animals to perform basic functions in their environment.

• Ex. A dog keeps

cool by panting.

• Ex. A Giraffe has a long neck to reach the tall leaves.

Obtaining Food

• All animals must obtain food by eating other organisms.

• Animals feed on plants and/or animals• Plant eaters – herbivores• Meat eaters – carnivores• Plant & meat eaters – omnivores

• Humans are _________.

Keeping Conditions Stable

• Cells that get too hot or cold die

Ex: a Burn – frost bite

This is why we sweat – to keep our bodies cool.

Where do you find the most worms and bugs?

Movement

• All animals move in some way.

Ex: swimming, walking, crawling, hopping…

Animals move for basic survival needs:

food & shelter

Reproduction

• Sexual Reproduction: a new organism develops from the joining of two sex cells – a male sperm cell & a female egg cell.

• Fertilization: When the sperm and egg join. New organisms will have characteristics from both parents.

• Asexual Reproduction: when a single organism produces a new organism identical to itself.

Ex: A sea anemone sometimes split down the middle producing two identical organisms.

Animal Classification• More than 1.5 million species of

animals• 35 Major Groups –

Each one is called a Phylum

•Vertebrates:

Animals with a backbone

Invertebrate:

Animals without a backbone