Starfish Dissection Quiz Material

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Madreporite
opening of water-vascular system

Spines
used for protection…some are hallow and inject dissolved oxygen…keeps starfish clean

Anus
small circle in center of madreporite and on spines on outer surface of starfish

Oral
bottom side

Aboral
top side

Mouth
opening in center of oral view

Ambulacral groves
from mouth to end of each arm

Tube feet
help to sence food/chemicals…they stretch along the body/arms…pokes through holes…can be extended or contracted

Gonads
where sex cells are produced…underneath pyloric cecum…this is where fertilization is produced

Ambulacral ridge
runs along length of arm

Ampullae
responsible for part of w-v system…attatched to tube feet

Oscicles
the rib like structures

Pyloric stomach
top stomach

Cardiac stomach
bottom stomach…engulfs prey and digests

Echinoderms
all marine animals…”spiny skin”…live in salt water…shell is made of calcium carbonate…have w-v system

Asteroidea
class of starfish… (phylum Echinodermata)

W-v system
hydrolic system for locomotion, food waste, transportation, and respiration…made of fluid-filled tubes

Circular ring canal
where water circulates

What they eat?
starfish, chitons, coral, sea cucumbes, sea urchins, snails, sponges, and worms…clams, mussels, and oysters

Catch prey?
tube feet attatches…sucks them through cardiac stomach…secretes enzymes and begins digesting

Food digested?
mouth sucks up food…stomaches extend through mouth…digestive glands in arms secrete enzymes and absorb nutrients in food

Sense surroundings?
nerves from mouth to each arm along body

Sense light?
eyespots at tip of each arm

Structure of nervous system?
consists of nerve plexus below skin… the esophagus is surrounded by nerve plexus…ring/radial nerves are balance

Obtain O2
gills and tube feet

Fertilization?
releases eggs and spirm into water…females can release 100 million eggs at a time…then larvae develops

Radial symmetry
different ways to divide something with a straight line, but all meet at middle

Regeneration?
metemorphasis into adult form…reproduce by transverse asexual fission

We use cookies to give you the best experience possible. By continuing we’ll assume you’re on board with our cookie policy arm/ray help with movement and capture prey madreporite (sieve plate) where water enters in the water vascular system WE …

We use cookies to give you the best experience possible. By continuing we’ll assume you’re on board with our cookie policy Dorsal Spine Part of the endoskeleton of the starfish that provides protection and supports. Tube Feet Allows the starfish …

We use cookies to give you the best experience possible. By continuing we’ll assume you’re on board with our cookie policy Madreporite Lets Water Into Water Vascular System Ampulla Squeeze To Controll Water Entering /Leaving Tube Feet WE WILL WRITE …

We use cookies to give you the best experience possible. By continuing we’ll assume you’re on board with our cookie policy Central Disc The center part of the animal Arms or Rays. Protrude from disc. help sea star to move …

We use cookies to give you the best experience possible. By continuing we’ll assume you’re on board with our cookie policy Arms Extensions of the body used for locomotion in some echinoderms Madreporite Opening through which the water enters the …

We use cookies to give you the best experience possible. By continuing we’ll assume you’re on board with our cookie policy Ampullae “Eyedropper” top of tube feet Gonad Produces gametes WE WILL WRITE A CUSTOM ESSAY SAMPLE ON ANY TOPIC …

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