structure of an animal cell: the basic unit of structure and function in living things. tissue: a...
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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!
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Functions of Animals• obtain food & oxygen
• keep internal conditions stable
• Move
• Reproduce
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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.
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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 _________.
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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?
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Movement
• All animals move in some way.
Ex: swimming, walking, crawling, hopping…
Animals move for basic survival needs:
food & shelter
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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.
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Animal Classification• More than 1.5 million species of
animals• 35 Major Groups –
Each one is called a Phylum
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•Vertebrates:
Animals with a backbone
Invertebrate:
Animals without a backbone