Earthworm Biology and Physiology

The video explores the complexity of earthworms, highlighting their streamlined bodies, lack of eyes, and light-sensitive cells. It explains their response to light as a stimulus, their digestive process involving organic matter, and their closed circulatory system with five hearts. The video also demonstrates how temperature affects their heart rate and activity, comparing it to human responses.

What physical feature allows earthworms to move easily through soil?

• Appendages

• Streamlined bodies

• Eyes

• Wings

Why do earthworms not require eyes?

• They use sonar

• They have excellent hearing

• They live underground

• They are nocturnal

How do earthworms react when exposed to light?

• They freeze in place

• They seek darkness

• They become more active

• They move towards the light

What is the primary diet of earthworms?

• Water

• Organic matter in soil

• Small rocks

• Insects

What happens to the material that earthworms cannot digest?

• It is used to build muscle

• It is converted into energy

• It is excreted

• It is stored in their bodies

How many hearts do earthworms have?

• Five

• Three

• Seven

• One

What type of circulatory system do earthworms possess?

• None

• Partial

• Closed

• Open

What happens to an earthworm's heart rate when placed in ice water?

• It stops completely

• It slows down

• It remains the same

• It increases

How do earthworms respond to cold environments?

• They shiver

• They become more active

• They migrate

• They go into energy conservation mode

How do humans typically respond to cold environments compared to earthworms?

• By hibernating

• By shivering

• By slowing down their heart rate

• By seeking warmth