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Invert Biology > lab 8: echinodermata to chordates > Flashcards

lab 8: echinodermata to chordates Flashcards

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1
Q

echinodermata defining characteristic

A

internal skeleton composed of CaCO3 lattice

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2
Q

water vascular system

A

involved in locomotion, prey capture, and resp

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3
Q

echino symm

A

pentaradial

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4
Q

echino larvae symm

A

bilateral

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5
Q

echino embryonic development

A

deuterostome

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6
Q

class stelleroidea

A

sea stars, and brittle and basket stars

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7
Q

class echinoidea

A

sea urchins, sand dollars, heart urchins

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8
Q

class holothuroidea

A

sea cucumbers

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9
Q

class crinoidea

A

sea lilies, feather stars

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10
Q

dermal ossicles

A

individual unit of the internal calcareous skeleton covered in epidermis

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11
Q

pedicillariae

A

baby jaws arranged around the spines of the aboral surface

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12
Q

madreporite

A

place of intake of w for the w vascular system

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13
Q

tube feet

A

used in locomotion on sea stars and for catching/opening prey

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14
Q

dermal brachiae

A

minor role in gas exchange

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15
Q

echinoderm repro

A

open fert, no parental care

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16
Q

test

A

echinoidea skeleton - fused plates

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17
Q

aristotle’s lantern

A

toothed feeding structure in echinoidea

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18
Q

planktonic larval stage of urchins

A

echinopluteus larva

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19
Q

holothuroidea movement

A

mostly benthic

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20
Q

calcareous skeleton in holoth

A

reduced to microscopic ossicles embedded in the body wall and an internal ring near the mouth

21
Q

pinnules in crinoidea

A

side branches on the arms used for feeding

22
Q

calyx in crinoidea

A

meeting point of arms

23
Q

ossicles in crinoidea

A

coin-like structures in stacks that support the stalk

24
Q

do crinoidea have a madreporite?

A

no

25
Q

notochord

A

a cartilaginous skeletal rod supporting the body in all embryonic and some adult chordate animals (defining characteristic)

26
Q

do hemichordates have a notochord

A

no

27
Q

what two chordata features do hemichordates have?

A
  • dorsal nerve chord

- pharyngeal slits

28
Q

pharyngeal slits

A

openings between the pharynx, or throat, and the outside

29
Q

buccal tube

A

dorsal extension of the pharynx

30
Q

graptolites

A

an extinct marine invertebrate animal of the Paleozoic era, forming mainly planktonic colonies and believed to be related to the pterobranchs

31
Q

4 features common to chordates

A
  • dorsal hollow nerve cord
  • notochord
  • pharyngeal slits
  • post anal tail
32
Q

conodonts

A

a fossil marine animal of the Cambrian to Triassic periods, having a long wormlike body, numerous small teeth, and a pair of eyes

33
Q

urochordates larva

A

tadpole-like, motile

34
Q

urchordate movement

A

sessile adults; disperse in larval stage

35
Q

class ascidiacea

A

sea squirts, tunicates

36
Q

class thaliacea

A

salps

37
Q

class larvacea

A

mucus-house builders

38
Q

pharynx in sea squirts

A

filtering bag which makes up most of the body

39
Q

tunic in sea squirts

A

tough outer coating for the pharynx

40
Q

oral siphon in sea squirts

A

where water is drawn in

41
Q

atrium in sea squirts

A

the main chamber

42
Q

atrial siphon

A

where water waste is expelled

43
Q

sea squirt digestion (3)

A
  1. particles trapped in mucus
  2. mucus slides down digestive system
  3. wastes expelled out anus
44
Q

thaloiacea (salps) characteristics (3)

A
  • transparent
  • free-living
  • planktonic
45
Q

salps motility

A

by using their oral and atrial siphons

46
Q

larvacea movement

A

they secrete a mucus house around themselves and use movements on their tail to move w thru the house to propel them forward

47
Q

cephalochordata - lancelets look like

A

fishes

48
Q

lancelet characteristics (2)

A
  • filter feeders who draw w thru their pharynx

- spend life buried in the sand with only their heads out

Invert Biology (25 decks)

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