Phylum Porifera: The Sponges
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Phylum Porifera: The Sponges

This quiz explores the characteristics of Phylum Porifera, commonly known as sponges. Learn about their marine habitat, asymmetrical body structure, cellular level of organisation, and their unique water transport system for food gathering and waste removal.

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@EasyToUseSalmon

Questions and Answers

What is the pathway of water transport in sponges helpful for?

Food gathering and respiratory exchange

What type of animals are commonly known as sponges?

Marine animals

What supports the body of sponges?

Skeleton made up of spicules or spongin fibres

What is the reproductive condition of sponges?

<p>Hermaphrodite (both sexes produced by the same individual)</p> Signup and view all the answers

How do sponges reproduce asexually?

<p>By fragmentation</p> Signup and view all the answers

What is the main function of the water transport or canal system in sponges?

<p>Food gathering, respiratory exchange, and waste removal</p> Signup and view all the answers

What lines the spongocoel and canals in sponges?

<p>Choanocytes or collar cells</p> Signup and view all the answers

How is digestion carried out in sponges?

<p>Intracellularly</p> Signup and view all the answers

What is the composition of the skeleton that supports the body of sponges?

<p>Spicules or spongin fibres</p> Signup and view all the answers

How do sponges reproduce sexually?

<p>Formation of gametes and internal fertilization</p> Signup and view all the answers

Study Notes

Characteristics of Sponges

  • Sponges are commonly known as Porifera, a type of animal.
  • The body of sponges is supported by a skeleton composed of calcium carbonate or silica spicules.

Water Transport System

  • The water transport or canal system in sponges is helpful for bringing food particles and oxygen to cells and removing waste products.
  • The main function of the water transport system is to facilitate the exchange of materials between the sponge and its environment.

Spongocoel and Canals

  • The spongocoel (central cavity) and canals in sponges are lined with specialized cells called choanocytes.

Nutrition and Digestion

  • Digestion in sponges is an intracellular process, meaning it occurs within cells.

Reproduction

  • Sponges are hermaphroditic, meaning they have both male and female reproductive organs.
  • Sponges reproduce asexually through the formation of gemmules, which are specialized structures that can develop into new individuals.
  • Sponges reproduce sexually by releasing sperm and eggs into the water column, which then fuse to form a zygote.

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