Practiacl ll Material (Mollusks And Annelids) Flashcards
What is the function of Labial Palps in Clams?
The paired labial palps in the mantle cavity are used in FEEDING, The outer palp on each side collects organic material.
What is the function of the foot in clams?
The muscular foot enables the clam to burrow itself in mud or sand.
What is the function of the excurrent siphon in clams?
The excurrent siphon is where waste and water leaves.
What is the function of the incurrent siphon in clams?
The incurrent siphon is where water is carried into the clam.
What is the function of the siphon in squids?
The siphon propels the squid through the water in the opposite direction to which the siphon is pointing.
What is the function of sucker caps in squids?
Each sucker has a ring of razor-sharp “teeth” that help them latch onto and take down prey.
What is the function of the cecum in squids?
It performs some digestion and is the primary site of absorption of nutrients.
What is the function of the ink sac in squids?
The place that contains ink which the squid will release through the siphon to cloud water and detract predators.
How can you tell the ventral side from the dorsal side of the clam?
The ventral is the side in edge that is opposite the umbo.
The dorsal side is the side or edge with the umbo.
When dissecting the clam, what are the muscles that you cut in order to open the clam?
You have to cut the adductor muscles
What is the inner shell layer of the clam called?
The nacreous layer
Is the mouth of the clam dorsal or ventral? Why?
The clams mouth is on ventral end, next to the foot because it needs to be close to the anus for the excretion of waste.
How many tentacles does a squid have?
Two tentacles
Where is the beak found in squids?
In the center of their web of tentacles
How do squids protect themselves?
It can use its ink sac, startle an oncoming predator, physically attack it, move erratically to confuse it play dead, or flee.
