What kind of locomotion do platyhelminthes have?

Small flatworms (Platyhelminthes) and some of the smaller molluscan species move along the bottom by ciliary activity. On their ventral (bottom) surface, a dense coat of cilia extends from head to tail. The direction of the ciliary beat is tailward, causing the animal to glide slowly forward.

1. What two forms of locomotion are among flatworms?
2. What is used for locomotion in some worms?
3. What is pedal locomotion?
4. What methods of locomotion are used by Planaria?
5. How do platyhelminthes respire?
6. Are platyhelminthes hermaphrodites?
7. What is the type of locomotion in earthworm?
8. What kind of movement are seen in birds?
9. What are Auricles in worms?
10. How does locomotion take place in birds?
11. What is ciliary creeping?
12. What is the use of locomotion in animals?
13. Do Planaria have flagella?
14. What primitive systems do Planaria have?
15. Which type of asexual reproduction is observed in planaria?

What two forms of locomotion are among flatworms?

Small flatworms use waves of ciliary action for locomotion to glide over surfaces, whereas larger species use muscular movements of their entire body to creep, swim, twist or somersault along the substrate.

What is used for locomotion in some worms?

An earthworm moves using circular and longitudinal muscles, as well as bristles called setae. The earthworm can push the setae out of its body to grab the soil around it. To move forward, the worm uses its setae to anchor the front of its body and contracts the longitudinal muscles to shorten its body.

What is pedal locomotion?

In pedal locomotion, which is a slow, continuous gliding that is superficially indistinguishable from ciliary locomotion, propulsion along the bottom is generated by the passage of contraction waves through the ventral musculature, which is in contact with the bottom surface.

What methods of locomotion are used by Planaria?

Planaria are carnivorous flatworms that move by beating cilia on their ventral surface against a secreted mucus layer.

How do platyhelminthes respire?

Flatworms are small, literally flat worms, which 'breathe' through diffusion across the outer membrane. The flat shape of these organisms increases the surface area for diffusion, ensuring that each cell within the body is close to the outer membrane surface and has access to oxygen.

Are platyhelminthes hermaphrodites?

With very few exceptions, platyhelminthes are hermaphroditic, and their reproductive systems are generally complex. Numerous testes but only one or two ovaries are usually present in these flatworms.

What is the type of locomotion in earthworm?

type of locomotion

Peristaltic locomotion is a common locomotor pattern in elongated, soft-bodied invertebrates, particularly in segmented worms, such as earthworms. It involves the alternation of circular- and longitudinal-muscle-contraction waves.

What kind of movement are seen in birds?

Fore limbs of birds were modified into wings due to which these can fly. Hind limbs are legs due to which they can jump, walk or swim as can be seen in ducks. The skeleton of birds is hollow to reduce weight and the breastbone muscle use to move the wings up and down.

What are Auricles in worms?

The auricles are lateral flaps near the anterior of the animal. The auricles are chemoreceptors and sense chemicals in the water. Also near the anterior are two eyespots. These allow the flatworm to sense whether it is darkness or light.

How does locomotion take place in birds?

Bird flight is the primary mode of locomotion used by most bird species in which birds take off and fly. ... Bird flight is one of the most complex forms of locomotion in the animal kingdom. Each facet of this type of motion, including hovering, taking off, and landing, involves many complex movements.

What is ciliary creeping?

n. The rhythmic sweeping movement characteristic of epithelial cell cilia or ciliate protozoans.

What is the use of locomotion in animals?

Animals locomote for a variety of reasons, such as to find food, a mate, a suitable microhabitat, or to escape predators.

Do Planaria have flagella?

Unlike the roundworm C. elegans, planarians do not move by undulatory body motion. Instead, planarians glide over the substratum, being propelled by the beating of numerous short flagella (or cilia) that project from their multi-ciliated ventral epithelium.

What primitive systems do Planaria have?

Planarians are considered to be among the most primitive animals which developed the central nervous system (CNS). ... The planarian CNS is located on the ventral side of the body, and composed of a mass of cephalic ganglions in the head region and a pair of ventral nerve cords (VNC).

Which type of asexual reproduction is observed in planaria?

Asexual freshwater planarians reproduce by tearing themselves into two pieces by a process called binary fission.