Unit N Day 3 - Skeletons

Organs and Structures - Skeletons and Exoskeletons

​SC.5.L.14.2: Compare and contrast the function of organs and other physical structures of plants and animals, including humans, for example: some animals have skeletons for support—some with internal skeletons, others with exoskeletons—while some plants have stems for support.

​TODAY’S TARGET: Recognize structures for support, protection, and movement in animals.

​Organs for Support, Protection, and Movement in Animals

​I. SUPPORT

• Structures for support in animals include skeletons (inside the animal) and exoskeletons (outside the animal).

• Both skeletons and exoskeletons hold the animals body up (support it) and give it shape.

Multiple Choice

Mammals such as, cats, kangaroos, elephants have skeletons also . These skeletons are ____________.

• made of plastic

• composed of fur

• different sizes and help them move

• constructed from feathers

Drag and Drop

The ​

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and ​

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have exoskeletons.

Drag these tiles and drop them in the correct blank above

crab

beetle

snake

elephant

human

turtle

​II. ​EXOSKELETON

• An exoskeleton is a hard, external shell that covers the body of the animal inside.

  • Crabs, spiders, and insects are examples of arthropods with exoskeletons.

    • Don’t confuse all shells as exoskeletons.

      • Turtles and tortoises shells are made from scales that have grown together for protections, and are not exoskeletons.

Multiple Select

what is a exoskeleton?

• a exoskeleton is a skeleton inside your body.

• a skeleton outside your body

• no skeleton

• a skeleton only in humans

Multiple Choice

TRUE or FALSE

Shells and Exoskeletons are the same thing.

• True

• False

​III. PROTECTION

• Skeletons, exoskeletons, and scales all provide protection.

  • The brains of animals with internal skeletons are protected by skulls.

  • The ribcage of an internal skeleton also protects the organs of the animal.

  • An exoskeleton protects the entire organism.

  • Skin and scales also provide protection for animals

    • scales are hard plates that grow on the outside of reptiles, fish, and the feet of birds.

Drag and Drop

Skeletons, exoskeletons, and scales all provide ​

Placeholder

Drag these tiles and drop them in the correct blank above

protection

camouflage

life

energy

food

Dropdown

Scales are ​

Select answer

that grow on the outside of reptiles, fish, and the feet of birds.

​IV. MOVEMENT

• Animals with skeletons use the skeleton working with muscles to move

  • Mammals have combinations of legs, arms, and tails that can be used to provide motion.

  • Many reptiles also use legs for motion.

  • Alligators have long tails that they use to swim with.

  • Turtles have fins to help them swim.

  • ​Birds have two legs that can be used for walking, and two wings that can be used for flying.

  • legless reptiles use their entire body to move.

    • Remember: all reptiles have internal skeletons with backbones, including snakes, and are classified as vertebrates.

Drag and Drop

All reptiles have ​

Placeholder

with backbones, including snakes, and are classified as ​

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.

Drag these tiles and drop them in the correct blank above

internal skeletons

vertebrates

exoskeletons

inverterbrates

invertebrates

Multiple Choice

Animals with skeletons use the skeleton working with ________ to move.

• bones

• muscles

• exoskeleton

• scales