Presentation on theme: "Complete questions on Coloring sheet for tomorrow. Complete ‘Scramble Words’ Vocabulary sheet for Wednesday. Quiz on Thursday on the vocabulary for Annelida."— Presentation transcript:
Complete questions on Coloring sheet for tomorrow. Complete ‘Scramble Words’ Vocabulary sheet for Wednesday. Quiz on Thursday on the vocabulary for Annelida
The segmented worms “annelus” - little ring I’m metameric
3 classes of Annelida Class Polychaeta – mostly marine fanworms, bristle worms, tube worms
Nephridia for excretion Clitellum – Secretes mucous ring for fertilization. Ganglia form ‘brain’. Has a ventral nerve cord. Color Blue
Nephridia – Helps with excretion of nitrogen containing wastes.
Reproduction: Example - Earthworm Sexual reproduction Hermaphrodites – Male and Female reproductive structures. Eggs produced in ovaries Worms exchange sperm: Sperm produced in testes. Seminal receptacles receive the sperm from the other worm during mating. Seminal vescicles store sperm from other worm. External fertilization in a mucous ring which becomes a cocoon. Mucous ring forms at clitellum.