11-2 LAB Starfish Dissection- Phylum Echinodermata Class Asteroidea

Madreporite/anus - Water is drawn in and down stone canal and down ampulla of each "leg". Leads to movement of tube feet.
















Central Disc
















Mouth
















Tube Feet
















ampulla- water (celoemic fluid) in ampulla is what cause movement of tube feet















Hepatic caecum
















Stone canal- comes off of madroporite
Goes to ring canal, and then to ampulla
















Stomach

Remember, the starfish dissection is Phylum Echinodermata Class Asteroidea.