Lab 5 Flashcards
Shark details
Do you know the basic external anatomy of the shark?
no - go study
yes - good jobs
function of endolymphatic pores
function of hearing
where are the endolymphatic pores
posterior to the eye
what is the purpose of the ampulae of lorenzini
function in electroreception, part of lateral line system
where is the ampulae of lorenzini
they are the pores of the snout (ventral)
what is the lateral line system
Canals filled with a jelly that run the length of the body and open up to surrounding environment via lateral line pores, modified to ampullae of Lorenzini on the snout
what is the function of lateral line pores
used to detect movement in water to locate prey
sensory in shark
hitting them on the snout to deter them
who has ctenoid scales
bass and perch
who has cycloid scales
salmon and carp
who has ganoid scales
gar
who has placoid scales
sharks
do you know the anatomy of a placoid scale?
no - go study slide 10
yes - good job
how are teeth and placoid scales similar
epidermis, dermis, enamel, dentin, same origin
look at picture and study on slides - slide 11
trunk muscles of an amphioxus
myotomes
do you know the cross section of the amphioxus tail
no? go study slide 16
yes good job
what do the scales look like?
slide 9
ctenoid - squarelike, spiny on one end, ridges on the other
cycloid - more circular - slight ridges on one end
ganoid - diamond shaped with an extra shelf to hook onto other scales
placoid scales - a thick, sideways umbrella
truck muscles of a lamprey
myomeres
how do lampreys feed
attaching itself to its host through a large buccal cavity funnel with horny denticles which keeps it attached. toungle-like cartiligous rod covered with Horney teeth rasp the flesh
what is the lamprey myomeres separated by
myosepta
lamprey muscle has 2 types of layers, but is in a cookie like formation. What are the outside, and what’s the inside
central and parietal. parietal-central-parietal
what are the the dorsal and ventral muscles of a shark trunk called
epaxial, hypaxial
what are the epaxial-hypaxial muscles separated by
horizontal septum
how are the right and left hypaxial muscles separated
ventral vertical septum (linea alba)
how are myomeres separated
myosepta
describe trunk muscles of necturus/salamander
has epaxial and hypaxial muscles, separate dby horizontal septum, has myomeres, separated by myoseptum,
