Annelida (Ring worms) Quiz

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Which characteristic is true for Phylum Annelida?

Excretory system with multiple pairs of nephridia per somite

Covered by a thick, dry & chitinous cuticle

Bilaterally symmetrical & triploblastic worms (correct)

Open circulatory system with no pseudohearts

How does respiration generally take place in Phylum Annelida?

By lungs similar to mammals

Through direct contact with the air

By absorbing oxygen through the skin

Simple diffusion through the epidermis or through the gills in aquatic forms (correct)

What is the composition of the circulatory system in Phylum Annelida?

Closed type with multiple pairs of hearts and no blood plasma

Semi-closed type with one pseudoheart and no blood plasma

Open type without any hearts and no blood plasma

Closed type with pseudohearts and blood plasma containing dissolved haemoglobin (correct)

What is the structure of the nervous system in Phylum Annelida?

Dorsal pair of cerebral ganglia connected to a mid-ventral double nerve cords Signup and view all the answers

What is the mode of reproduction in Phylum Annelida?

Sexes may be separate (dioecious) and sometimes united (hermaphrodite), some reproduce asexually by budding Signup and view all the answers

What type of symmetry do animals in Phylum Annelida exhibit?

Bilateral symmetry Signup and view all the answers

How is the musculature generally represented in animals of Phylum Annelida?

Circular and longitudinal muscle layers Signup and view all the answers

What is the composition of the body space between the body wall and alimentary canal in animals of Phylum Annelida?

True coelom Signup and view all the answers

How does respiration generally take place in aquatic forms of Phylum Annelida?

Through gills Signup and view all the answers

What is the mode of reproduction for animals in Phylum Annelida?

Hermaphroditism Signup and view all the answers

What type of symmetry do animals in Phylum Annelida exhibit?

Bilateral symmetry Signup and view all the answers

How is the circulatory system generally characterized in animals of Phylum Annelida?

Closed type with pseudohearts Signup and view all the answers

What is the mode of respiration generally observed in aquatic forms of Phylum Annelida?

By gills Signup and view all the answers

What is the composition of the body space between the body wall and alimentary canal in animals of Phylum Annelida?

True coelom Signup and view all the answers

What is the general composition of the musculature in animals of Phylum Annelida?

Both circular and longitudinal muscle layers Signup and view all the answers

Study Notes

Characteristics of Phylum Annelida

Segmented body plan divided into metameres (segments), allowing for greater mobility and specialization.
Bilateral symmetry is present, facilitating directional movement and organization of body structure.

Respiration in Phylum Annelida

Generally occurs through the skin (cutaneous respiration) with oxygen absorption directly from the surrounding environment.
Aquatic species often utilize gills for efficient gas exchange in water, enhancing respiration.

Circulatory System of Phylum Annelida

Characterized by a closed circulatory system, where blood is contained within vessels, ensuring efficient transport of nutrients and oxygen.
Presence of multiple hearts (aortic arches) in some species, which help in pumping blood throughout the body.

Nervous System Structure in Phylum Annelida

Composed of a ventral nerve cord with segmental ganglia, which coordinate movement and sensory information.
Cerebral ganglia function as a primitive brain, integrating sensory input and regulating behavior.

Reproduction in Phylum Annelida

Asexual reproduction occurs through fragmentation in some species; most reproduce sexually with distinct male and female individuals.
Some species are hermaphroditic, possessing both male and female reproductive organs, facilitating reproduction.

Musculature in Phylum Annelida

Composed of circular and longitudinal muscle layers, allowing for coordinated movement and locomotion through contraction and relaxation.
The musculature aids in burrowing and swimming, adapting to different environments.

Body Cavity Composition in Phylum Annelida

Coelom is the body space between the body wall and alimentary canal, providing a hydrostatic skeleton for support and movement.
The coelom is filled with coelomic fluid, allowing for better distribution of nutrients and waste products.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Description

Test your knowledge about the phylum Annelida, which includes bilaterally symmetrical, triploblastic worms with clearly segmented bodies and minute rod-like chitinous setae appendages. Learn about the general characteristics of Annelida and their classification within the animal kingdom.