Animal Digestive Systems and Functions

The video tutorial explores the digestive systems of four species: sea star, earthworm, frog, and pig. It highlights the unique features and processes of each species' digestive system, from the sea star's cardiac stomach to the pig's omnivorous diet. The tutorial also encourages further exploration of body systems using Visible Biology's resources.

What is the primary focus of the Evolution Animal Diversity Unit in Visible Biology?

• Exploring marine life

• Studying plant growth

• Analyzing human anatomy

• Comparing body systems across different species

How do sea stars consume larger prey?

• By using their tentacles

• By pushing their cardiac stomach out of their mouth

• By swallowing them whole

• By using their teeth

What is the primary function of the pyloric stomach in sea stars?

• To excrete waste

• To secrete enzymes for digestion

• To grind food

• To store food

What role does the gizzard play in the earthworm's digestive system?

• It absorbs nutrients

• It grinds food with the help of stones

• It stores food

• It excretes waste

What is the primary diet of earthworms?

• Aquatic plants

• Small mammals

• Decaying organic matter

• Insects and spiders

Which part of the frog's digestive system is responsible for storing nutrients for long periods?

• The cloaca

• The fat bodies

• The small intestine

• The stomach

What is the function of the cloaca in frogs?

• It grinds food

• It stores food

• It excretes waste and gametes

• It absorbs nutrients

How do frogs capture their prey?

• By using their claws

• With their retractable tongue

• With their teeth

• By swallowing them whole

What is a unique feature of the pig's digestive system compared to the other animals discussed?

• It has a cloaca

• It has a crop

• It uses a cardiac stomach

• It has a long snout for rooting

Which organ in pigs secretes bile?

• The pancreas

• The small intestine

• The stomach

• The liver