Bio1AL_Fa09_lab10_review

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Unformatted text preview: STUDENT
REVIEW
SHEET
INVERT
II
 
 PHYLUM
ECHINODERMATA:

please
examine
the
demos
 A.

Starfish
 1)
external
structures:
central
disk,
arms
(rays)
oral
surface,
mouth,
ambulacral
grooves,
aboral
 surface,
madreporite,
spines,
dermal
branchiae,
pedicellariae
(use
a
dissecting
scope
for
the
last
two
 items)
 2)
internal
structures:
water‐vascular
system,
coelom,
stone
canal,
radial
canal,
tube
feet,
ampullae,
 calcareous
endoskeleton,
hepatic
caeca,
pyloric
&
cardiac
stomach,
gonads,
 3)
reproduction:
refer
to
reproduction
lab
 
 B.

Urchin
 1)
external
structures:
tests
(calcareous
endoskeleton
consists
of
a
series
of
intercalating
plates.
 2)
Sea
urchin
fertilization:
a
very
rapid
process,
examine
several
stages
(this
may
be
done
in
the
 reproduction
lab).
 
 
 PHYLUM
ARTHROPODA:

please
examine
the
demos
 A)
 Arthropod
development:
 
 1)

Incomplete
metamorphosis
(direct
or
gradual
development,
or
hemimetabolous)
e.g.,
cockroach


egg‐‐‐‐ ‐‐>
nymph‐‐‐‐‐‐>adult

 
 2)

Complete
metamorphosis
(holometabolous),
e.g.,
Drosophila
 
 

 egg‐‐‐‐‐‐>*larva‐‐‐‐‐‐>pupa‐‐‐‐‐‐>*adult

(*motile)
 B)

 external
features:
Metameric
(segmented),
Chitinous
exoskeleton,
growth
via
molting,
highly
cephalized,
 true
coelom
(replaced
by
hemocoel
),
,
jointed
legs,
head,
thorax,
abdomen
3
pairs
of
legs
(all
on
thorax)
1
 pair
of
antennae
 C)

 Class
Insecta,
fruit
fly
&
cockroach
 i)
external
features
 
 1.

Fruit
fly
(Drosophila),
adult
 **Head
with
mouth
parts,
incl.
proboscis,
3
simple
eyes;
2
compound
eyes
with
many
ommatidia
&
1
pair
of
 antennae
 **Thorax
with
wings
&
3
pairs
of
legs
 **Abdomen
 
 2.

Fruit
fly,
larval
stage
(maggots):
note
**Tracheal
tubules,
**Pair
of
reddish
spiracles
this
stage
lacks

real
 legs
 
 3.

Fruit
fly,
pupae
 
 4.

Cockroach,

 
 
 i)
external
features:
**Head,
antennae,
compound
eyes,
mouth

 parts,
**Thorax,
wings,
legs,
**Abdomen,
cerci,
spiracles
 
 ii)
internal
features:
open
**circulatory
system
=
dorsal
vessel,
hemocoel,

 haemolymph;
**Respiratory
system
=
spiracles,
trachea
&
tracheoles;
**Digestive
system
=
mouth,
 esophagus,
crop,
gizzard,
digestive
caecum,
midgut,
hindgut;
**Excretory
system
=

Malpighian
tubules;
 **Reproductive
system
=
female‐‐ovary
and
ovarioles,
male‐‐testes
(not
easily
seen),
conglobate
gland;
 **Nervous
system
=
nerve
cord
&
ganglia
 D.

Class
Crustacea
 
 1.

Crayfish,

 i)
external
features:
chelae,

antennae,
walking
legs
 ii)
internal
features:
Respiratory
system
=
gills;
Circulatory
system
=
heart,
pericardial
sinus
(blood
 carries
O2
and
CO2,
in
contrast
to
insects,
but
uses
the
copper‐containing
compound
hemocyanin);
 Reproductive
system
=
female‐‐ovaries
&
male‐‐testes,
specialized
swimmerets;

Digestive
system
=
 mouth,
stomach,
gastric
mill,
intestine,
digestive
glands;
Excretory
system
=
green
glands
 A67
–
Fall
2009
 ...
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This note was uploaded on 02/12/2010 for the course BIO 1A taught by Professor Schlissel during the Spring '08 term at Berkeley.

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