I WONDER - What Are Jellyfish Made Of?

Jellyfish are predators of smaller sea creatures but are mostly composed of water. They lack a brain and heart, controlling their bodies through a simple nervous system. Without blood, they don't need a heart to pump it. Their thin skin allows them to absorb oxygen directly, eliminating the need for lungs.

What is the primary composition of jellyfish?

• Calcium

• Protein

• Fat

• Water

Which of the following organs do jellyfish lack?

• Stomach

• Brain

• Liver

• Kidney

How do jellyfish control their bodies?

• Through a complex brain

• Using a net of nerves

• With a muscular system

• Via a circulatory system

Why don't jellyfish need a heart?

• They have a very small body

• They don't have blood

• They have multiple hearts

• They use a different organ

How do jellyfish obtain oxygen?

• Through gills

• By absorbing it through their skin

• Using lungs

• Via a special organ