Understanding Hydrostatic Skeletons

The video from Mumu Math and Science explains different types of skeletons, focusing on the hydrostatic skeleton found in animals like worms, leeches, and jellyfish. It describes how these skeletons work, using the earthworm as an example. The earthworm's internal cavity, called the celum, fills with fluid, allowing it to become rigid and aiding in movement. The video concludes with a call to subscribe for more educational content.

What type of skeleton do insects and other arthropods have?

• Exoskeleton

• No skeleton

• Hydrostatic skeleton

• Internal skeleton

Which of the following animals is known to have a hydrostatic skeleton?

• Bird

• Spider

• Earthworm

• Dog

What is the internal cavity of an earthworm called?

• Celum

• Stomach

• Lung

• Heart

How does the hydrostatic skeleton help an earthworm move?

• By becoming rigid and aiding movement

• By filling with air

• By providing a hard shell

• By growing new muscles

What happens to the earthworm's structure when the celum fills with fluid?

• It loses its shape

• It becomes rigid and structured

• It becomes soft and flexible

• It shrinks in size

What is the role of the hydrostatic skeleton in an earthworm?

• To produce energy

• To protect internal organs

• To store nutrients

• To provide shape and aid in movement

How is a hydrostatic skeleton similar to an inflatable structure?

• Both are made of metal

• Both rely on fluid or air to maintain shape

• Both are used for flying

• Both are solid and unchanging

What is the main function of the fluid in a hydrostatic skeleton?

• To store waste

• To cool the body

• To provide nutrients

• To maintain structure and assist in movement