Chordata Flashcards
1
Q
Phylum chordata
A
Agnatha Chondrichthyes Osteichthyes Amphibia Reptilia Aves Mammalia
2
Q
Urochordata
A
- sea squirts
- little blobs of jelly
- 3000 species
- larva exhibits all characteristics
- larva like tad poles
3
Q
Cephalochordata
A
- 20 species
- notochord never developed into backbone
- lancelet
4
Q
Vertebrates
A
- Agnatha
- chondrichthyes
- osteichthyes
- amphibia
- reptile
- aves
- mammalia
5
Q
Fish
A
Agnatha
Chondrichthyes
Osteichthyes
6
Q
Tetrapods means…
A
Four feet
7
Q
Tetrapods
A
Amphibia
Reptilia
Aves
Mammalia
8
Q
Agnatha
A
-jawless fish
9
Q
Chondrichthyes
A
- cartilaginous fish
- 1000 species
10
Q
Osteichthyes
A
- bony fish
- 29000 species
- Skeleton made of bones
- operculum-flap covering gills
- two chambered hearts
11
Q
Amphibia
A
5700 species
- thin moist glandular skin
- jelly coated eggs
- no claws or scales
- four legs usually
- three chambered hearts
- ectothermic
12
Q
Reptilia
A
8200 species
- scaly skin
- four limbs usually
- ectothermic
- internal fertilization
- three chambered heart
- shelled eggs
13
Q
Aves
A
26 orders
- 9600 species
- feathers
- epidermal scales on legs
- endothermic
- hollow bones
- specialized lungs-continuous one way flow
- beaks
- four chambered hearts
14
Q
Mammalia
A
- 3 subclasses
- 26 orders
- 5000 species
- 3 middle ear bones
- hair
- produce milk for young
- bellow like lungs
- four limbs
- four chambered hearts
