Chortada - Lab 5 Flashcards
Subphylum Tunicata common name
Sea squirts
What specim is shown here?
What development stage is it in?
Sea squirt
Tadpole (laval stage)
What are the structures in this photo?
Top right : Notochord
Top middle : excurrent canal
Top left : incurrent canal
Middle left : endostyle
Bottom left : adhesive paillae
Function of adhesive papillae?
Attach the larva to a sybstrate as it metamorphoses into an adult
Name the specimen
What are the two structure at the top called?
Adult sea squirt
Left : incurrent siphons
Right : excurrent siphons
Which subphylum does this specimen belong to
Subphylum Cephalochordata
What is the function of a nototchord ?
Provides skeletal support and a place for muscles to attach
Where is the rostrum?
At the nose
What is the moth surrounded by?
Oral tentacles
Which organ is responsible for the continous current of water flowing into the mouth?
What is this caused by?
The wheel organ
Ciliary action
Where does gas exchange occur?
Gill bars
What is the structure on the right?
what is its function?
The atriopore
Expels water from the body
Does the lancelet have a spinal cord?
No it is an invertebrate
It has a nerve cord extending the full length of the body
Which specim is this?
Does it have a spinal column?
Does it have a jaw?
Ammocoete larvae (young lampray)
Spinal cord : Yes
Jaw : No
Identify the fins from the left to the right
Caudal fin
Posterior dorsal fin
Anterior dorsal fin
Pectoral fin
