Skeletal systems

In today’s video, we will explore animals' skeletons and why animals have skeletons. We will also explore how animals’ skeletons are different by investigating the three different types of skeletons:

- Hydrostatic Skeleton
- Exoskeleton
- Endoskeleton

Skeletons:
Animals have skeletal systems to support their bodies, allow them to move and protect their internal organs. We often think of skeletons as a collection of bones but not all animals skeletal systems are made from bones. Some have shells while others have a fluid based skeleton. Each skeleton has its Pro’s and Cons that go along with it.

Hydrostatic Skeleton
This is a water based skeleton. Most animals that have a hydrostatic skeleton live in the ocean such as: jellyfish, sea anemones, octopus and starfish. But some creatures live out of the coean as well such as: slug and worms.
Pros: They are very flexible
Cons: They offer limited support
Exoskeleton
Animals with an exoskeleton have their skeleton on the outside of their body such as: crabs, lobsters, insects, spiders and scorpions. These creatures often have a shell or chitin exterior to protect their bodies.

Pros: The offer good protection and strengthen the animal
Cons: They restrict movement and don’t grow with the animal

Endoskeleton
Animals with endoskeletons have their skeletons inside their body like you or me. They are found in mammals, reptiles, fish, amphibians and birds.

Pros: Movement and support
Cons: Less flexible and protected

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Music:
Music from Storyblocks
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Sport And Cars Energetic Rock by MOKKA
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