MR. GLOVER · Web view25.4 – Phylum Annelida Body Structure of Segmented Worms Annelids undergo...
Transcript of MR. GLOVER · Web view25.4 – Phylum Annelida Body Structure of Segmented Worms Annelids undergo...
Biology 11
25.4 – Phylum Annelida
Body Structure of Segmented Worms Annelids undergo _________________ development. Include earthworms, marine worms, and parasitic leeches __________ and have a _____________ Rigidity in annelid segments creates a _______________ skeleton that muscles can push
against. Segmentation also permits segments to move ____________ of each other and enables
a worm to survive damage. Segments can be _____________.
Feeding and Digestion Running through all earthworm ___________ from the mouth to the anus is the
digestive tract.Circulation
Most annelids have a ___________ circulatory system. Respiration and Excretion
Earthworms take in oxygen and give off carbon dioxide through their __________ skin.
Aquatic annelids have __________ for the exchange of gases in the water. Segmented worms have two _____________ in almost every segment.
Response to Stimuli The ___________ segments are modified for __________ the environment.
Movement The earthworm contracts ___________ muscles running around each segment. This ____________ the segment and causes the fluid in the coelom to press
____________like paste. The fluid pressure causes the segment to get _________ and ______________.
Biology 11
The earthworm contracts the ___________ muscles that run the length of its body. This causes the segment to _____________ and return to its original shape, pulling its
posterior end _______________ and resulting in movement.Reproduction
Reproduce both ___________ and ____________ Sperm are passed between two worms near segments called the _____________. The clitellum produces a ____________from which the young earthworms hatch
Diversity of Annelids Annelida
Typically live underground in _______________ habitats.
___________ the soil as they feed off of it.
Earthworms and their relatives
Polychaeta Typically live in ______________
environments Bodies have _____________ for
swimming and crawling Filter feeders who trap food in
___________on their bodies.
Hirudinea Typically live in
___________environments Most are ______________ Leeches have adapted chemicals to stop
_____________ of blood.