V2006vertebratescomparativeanatomyfunctionevolution4th

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Unformatted text preview: mniotes
are
the
first
land‐exclusive
dwellers
 Extraembryonic membranes Craniates
 Lampreys
 Sharks,
rays,
skates,
etc.
 Ray‐finned
fishes
 Coelacanths
 Lungfishes
 Amphibia
(frogs,
 salamanders)
 Legs
 Tetrapods
 Lobe‐fins
 Gnathostomes
 Osteichthyans
 Amnion Allantois Chorion Yolk sac Vertebrates
 Embryo Amniotic cavity with amniotic fluid Yolk (nutrients) Jaws,
mineralized
skeleton
 Lungs
or
lung
derivatives
 Lobed
fins
 Shell Albumen Reptilia
 Amniotes
 Fig.
34‐2
 Amniotic
egg
 Milk
 (turtles,
snakes,
 crocodiles,
birds)
 Mammals
 Fig.
34‐25,
p.
715
 3
 11/2/09
 Vertebrae
of
young
trout
 Human
embryo
 Fig.
46.17

 From
Kent,
G.
(1991).
Comparative
anatomy
of
the
vertebrates
(7th
ed.).
 ‐ Notochord
is
made
up
of
fluid‐filled
cells

 ‐ Notochord
in
the
head
becomes
part
of
skull
 ‐ Notochord
in
the
trunk
and
tail
becomes
surrounded
by
cartilaginous
or
bony
vertebrae

 From
Kent,
G.
(1991).
Comparative
anatomy
of
the
vertebrates
(7th
ed.).
 Body
sectional
terms
 Primary
tissue
classes
in
vertebrates
 •  Epithelial:
tissue
composed
of
layer
of
 closely
spaced
cells
that
cover
organ
 surfaces
and
serve
for
protection,
 secretion
and
absorption
 •  Connective:
tissue

with
more
matrix
than
 cell
volume,
often
specialized
to
support,
 bind
together,
and
protect
organs
 •  Nervous:
excitable
cells
for
rapid
 transmission
of
nerve
impulses
to
other
 cells
 •  Muscular:
elongated
cells
for
contraction
 From
Kardong,
K.
V.
(2006).
Ver...
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