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Turbellaria

Hannah Lutgen

27/4/2020

Feeding and Digestion

They are kown for eating tiny aquatic invertebrates such as rotifers, small crustaceans, and other worms. Turbellarians eat both living and dead animal material.

Their digestive system starts in the mouth where it then leads to the pharynx and then into a temporary space that take in food particles by phagocytosis.

Circulation

They do not have a body cavity. Flatworms have no true body cavity, but they do have bilateral symmetry. Due to the lack of a body cavity,flatworms are known as acoelomates. Their gastrovascular cavity helps distribute nutrients throughout the body.

Respiration

Turbellarians do not have a respiratory or circulatory system; they exchange gases by diffusion through all their cells.

Excretion

They have a combination digestive/excretory system. It takes food in and gets rid of wastes through the same opening.

Response

The head region also has specialized sensory organs, which are more complex in turbellarians than in other flatworms. These organs include eye spots, which are composed of photoreceptors that detect light and aretactile, and chemical sensory organs that help turbellarians find food.

Movement

Turbellarians move around usingcilia on their epidermis or by undulating their body with their muscles.

Reproduction

Turbellarians that reproduce sexually are hermaphroditic--sperm from one animal will fertilize eggs from another, and the eggs then hatch into small turbellarians.

Habitat

Most turbellarians live in water, either fresh or salt water. While some live in moist, dark areas on land, most live at the bottom of marine water.

Video

Clip of a Turbrllaria eatting

End

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