SEA STAR DISSECTION

LAB PREP

Locate the madreporite on the aboral surface

Sea Star Dissection

Locate bivium and trivium

Sea Star Dissection

Cut off one of the bivium rays and create a cross section

Sea Star Dissection

Locate the eyespot at the tip of the ray of a trivium

Sea Star Dissection

Using scissors or a scalpel, carefully cut along the sides of a trivium ray from the eyespot to the central disk, extend the incision aroudn the central disk but go around the madreporite so it stays attached

Sea Star Dissection

Sea Star Dissection

Remove the organ (stomach) and locate the water vascular system

Sea Star DIssection

Remove the digestive glands and view the gonads

Identify gender, ovaries are orange while testes are gray

Sea Star Dissection