digestion in lower form of animals

Question 1

the primary digestive structure where food is ingested, digested, and waste is expelled through the same opening.

Answer 1

gastrovascular cavity in lower animals

Question 2

What are lower forms of animals?

Answer 2

Lower forms of animals include invertebrates, which are animals without a backbone.
Examples: Flatworms, Jellyfish, Sea Anemone

Question 3

found in simpler animals like flatworms and jellyfish

Answer 3

gastrovascular cavity

Question 4

How does digestion occur in lower animals?

Answer 4

Digestion in lower animals often occurs in the gastrovascular cavity, where food breakdown happens by digestive cells lining the cavity.
Extracellular digestion occurs, where digestive enzymes break down food, and the lining cells absorb the nutrients.

Question 5

involves digestive enzymes secreted into the gastrovascular cavity to break down food particles. The lining cells then engulf these particles for absorption.

Answer 5

extracellular digestion

Question 6

Do lower animals have specialized digestive organs?

Answer 6

Lower animals often lack specialized organs like a stomach or intestines, which results in less efficient digestion compared to higher animals.

Question 7

What is the evolutionary significance of the digestive system in lower animals?

Answer 7

The gastrovascular cavity is considered a primitive digestive system that supports simpler body plans and basic nutrition for simpler organisms.

Question 8

How do lower animals’ digestive systems adapt to their environment?

Answer 8

Lower animals have basic digestive systems that suit environments with readily available food, particularly in the form of small particles that can be easily ingested and digested.