Ch 32 - Deutrosomes Flashcards
(41 cards)
chodates; duerotosome ancestor:
true coelem, blastopore become one
Phylum Echindomeria
Habitat: marine
water vasculat system: feeding, gass exchange, defining
symmtery: bilteral
body surface: oral; aboral
major class of Echinoderms
Asteroids, crinodea, enchinidea
Asteroids
sea stars
Crinoidea
sea liles and feather stars
Echinoidea
sea uriches and sand dollar
* skelton- paltes are flattened.
Chordates’ subphylums
urochordata(intervertae chordata)
cephalochordata(invertebrate chordata)
Urochordata
Ex: Tunicates(sea squirls)
* body: carbohydrates tunic w/ opening for siphors
* features:
1. larva- all chordate features; swim
2. adults- only gilia
Cephalochordta
body, genus
- body: adults- all four chodrata features- no pirs of of arms, jaws, brain, and heart
*feeding- filter feeding - genus- brainchiostoma
craniates
structure inclosing the brain
skull
Class Myxini: Hagfish
not a vertebrate
habitat. body, teeth, notochord, fins, feeding, defensem body toniclty
- craninate jawless fish
- habitat: marine
- body: cranium=brain
- teeth: keratin on tongue( no jaws)
- notochord: flexible cartilage rod
- fins: no true fins.
- feeding: either a predator or scavanger
- defense: secretes slim
- covers gills of attacking fish or prey - body tonicity- mlycranitate isoosmatic w/ salt water
Class Ptrtmyzmtida (lamprey)
- jawless fish and odlest living veretabe
- habitat: all water
- llifestyle: parasite
- vertebral colum- primitative jawless
Class Cmondricitypes (cartilginous fishes)
- has jaws
- habitat: mostly marine, but some freshwater
- body:
- skeleton: cartilge infused w/ calcium salts
- teeth: replaceable, modifed scales
- scales: toothlike and non overlaping
- fins: paired
- mouth: ventral and gill openings and lateral in sharks
- senses:
- brain is well developed
- nose
- electrorecptors- detects prey
- lateral line organ- dect vibration in water
- body density: cuases them to sink when not swimming
- cloeaca- common openoing to outisde for three system
- reproduce, excretory and digestive - sexual dimmorphism
- clasper (male uses)
vertebrate mode of reproduction
oviparous, ovoiriparous
viviparous
oviparous
lays eggs
noursihment from yolk
ovoviriparous
eggs incubated inside mother
nourshment from yolk
viviparous
embroys develops within urterus
nutrients transferred from amternal bloodvessels to embryo
Ostcicthyes
jawed bony fish
- freshwater+ marine
- body- calcified skelton and cranium
- teeth- replicable
- scales- overlaping and flexiable
- fins- paired; supporting by cartilage or bone
- mouth- anterioly directed
- gills- internal
- swim bladder- buoyancy
- reproduction- mostly oviparous
*
Tetrapods- class amphibla
- having two lives( one in water and one on land)
- metamophorsis- many complete; some remain lavvas
- heart- three chambers
- three orders
what are the orders of amphibians
urodela- visible tails (salamders)
anura- no tail (frogs)
apoda- no feet(wormlike)
transition to land required evolution of what?
Amnote egg
class reptilia
they were the first to move to land
* shelled egg
* body- hard scales( watertight)
* lungs divided to many indiviaiul chmaber s
* three chambered heart
* well developed sense organs to locate prey
* Ecotherms- body temp chnges with surrounding environemnt
class reptilia: order testudines
- shell: bony plate overlaid by horny scales
- two parts:
- carapace- top shell; plaston- bottom shell - skeleton- vertebrae+ tibs fused to shell
- pectoral+ pelvic girdes lie inside ribs - mouth: jaws covered by horny beaks, no teeth( turtles, totroies, and terrapins)
turtles
water
