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50 Cards in this Set

  • Front
  • Back
what is the taxonomy of the coelecanth
phylum- chordata
subphylum- vertebrata
superclass- gnathostomata
Class- osteichthyes
sublass- sarcopterygii
superorder- crossopterygii
division-coelacanthiformes/ actinistia
what are some characteristics of crossopterygii (Coelacanth)
present day do not have internal nares, live in dep ocean, no lungs but do have swim bladder, have fringe (tassle) fin, oil is in hollow spine
distinguish between the types of tails p 304
heterocercal - non symetric both internal/ external ex. shark
diphycercal- symetrical both internal and external ex.= lungfish and dipnoans
homoceral- outside looks symetrical but vertebral column actually runs along top. ex. teleost fish
what is the genus / species of the Coelacanth
Latimeria chalumna
true / false the coelacanth does not have a true backbone
Do chordates belong to protosmata or deuterostomata ?
In chordates what is the cleavage type? What type of coelom develops? What embryonic layer is skeleton derived from?
radial, introcoelic (inavagination of tissue, mesoderm
what are the 5 unique chordate characteristics?
1) notochord 2. nerve chord 3. pharyngeal slits 4. postanal tail 5. thyroid
what embryonic tissue is the notochord devloped from? the nerve chord?
notochord= mesoderm
nerve chord= ectoderm
what are the three chordate subphyla?
vertebrata, urochordata, cephalochordata
what are the two subclasses of osteichthyans
sacropterygian, actinopterygian
what are 5 characteristics of agnathans?
4)no jaws/ true teeth
1) well defined notochord
2) incomplete verbera
3) cartilaginous skeleton
5) only medial fins
What are 3 characteristics of chondrichthyes?
1) cartlagineous skeleton
2) solid braincase
3) placoid sclase with some traces of bone
list some characteristics of Dipnoi (lungfish)
1) have internal nares
2) have functional lungs
3) fish can estivate
The example given in class of having feathers for warmth and theWn eventaully using them for flight is an example of what?
what groups that we have studied fall under Agnatha
lamprey, hagfish
hemichordates-acorn worm
urochordate- tunicate
cephalo chordate- amphioxus
in gnathostomes what are the jaws derived from
pharyngeal arch
Does a skate or Ray have a rostrum? and which produces leathery egg case
skate for both.
where are gills located on a ray and flatfish
ray= ventrum
flatfish= dorsal
what are fibroblasts composed of
collagen and elastin
what are the three cell types of the integument
columnar, cuboidal, squamous
if you are looking at fat with a microscope what do you call it? what about with eye
hypodermic, macroscopic view= superfcial fascia
what is the composition of blubber and what functions does it serve
fat + connective tissue; functions= conserve heat, fuel reserve, buyoncy, streamlinebody.
how are horns and antler different in composition
horns- are cornified skin with dermal bone core. Antlers are bony skull outgrowth.
what family are horns found in? what about antlers
horns= Bovidae. Antlers= Cervidae
what is the major and minor embryonic layers that cartilage develops from
major= mesoderm. minor=ectoderm (neural crest cells).
In cartilage where is vascular tissue
in perichondrium
what are teh four types of cartilage?
hyaline, fibrous, elastic, calcified
What type of cartilage is loaded with colagen and is resistant to tension.
what are some places that fibrous cartilage is located?
IV disc, patella, pubic symphyss.
true or false the baleen has bone embedded in it?
which class of whales has 2 blow holes?
jaws and claws used to take down prety are examples of ____ structures
what order do whales fall under and what suborder has one blowhole?
what type of whale skim the water surface and contantly takes in water and food.
what are some of the human bodies way of overcoming the instability created by bipedal locomotion
30degree upright shift in pelvis, 30 degree shift of lumbar region, sacrum shifted more dorsal, pelvis wider and shorter (solution to wide pelvis is femur bone comes back under body).
what are the main function of spines.
sites of muscle attachement where forces are converted into compressive forces.
what region of mammal vertebral column is aceolous
the lumbar region- for support
True or false the aphicoelous provides more flexibility then procoelous / opisthocoelous
false-it provides limited flexibility
What type of vertebrae is found in the cervial region of turtles and birds and does not provide much rotational flexbility.
what is the name of the projection that extends from the axis vertebrae into the atlas ,
odontoid process
Do agnathans have ribs? Do sharks? do osteichthyes?
agnathans= no
sharks= small ones
osteichyes= dorsal/ ventral ones
the process where a lizard can loose a portion of its tail and then regrow it is known as being able to ________
Do mammals have more more verebtae in thoracic or lumbar region? what about cetaceans
mammals= thoracic
cetaceans= lumbar
list the number of sacral vertebra in amphibians, reptiles, most mammals, humans
amphibians= 1
reptiles= 2
most mammals=3
humans= 5
what composes the ptergyophore in proximal fin
the basals and radials.
waht is the difference between ceratotrichia and lepidotrichia
ceratotrichia are not composed of segmented bones and are keratinzed fin rays ; are found in chondrichthyes. p321
what is the name of the joint where the humerus attaches to the shoulder
glenoid fossa
In the fore and hind limbs what are the two more later bones in the zygooiduyn
UF- ulna and fibula
what is the cannon bone a fusion of?