Download File - cOACH RICH`S BIOLOGY CLASS

Bell work
1.
General Reminders
If you did not pass your exam remember you must come in to AST
to correct your test and retest for a higher grade.
Saturday School 4/2 9:00-12:00
Test date 4/7
Journals Due 4/7
EOC Tutoring
• No tutoring this week due to EOC
QUIZ
Clear your desks of everything
Use CAPITAL letters please
Keep your answers covered
If you need to make up a quiz due to an absence…
come see me Tues or Thurs during AST
Flip it over when you are finished and hang on to it
Phylum Echinodermata
General Characteristics
• Coelomates
• Radial symmetry – 5 part
• Ability to regenerate
• Endoskeleton
Feeding & Respiration
• Feeding method:
– Variety of feeding methods
• Respiration:
– Gills & water vascular system
Circulation & Excretion
• Circulation:
– Water vascular system
• Excretion:
– Feces released through anus
– Ammonia passed through thin walled
tissues of tube feet or gills
Response
• Nerve ring that surrounds mouth
connected to radial nerves in each arm
• Detect light, gravity, chemicals
Movement & Reproduction
• Movement:
– Water vascular system – tube feet
• Reproduction:
– Sexual – external fertilization - dioecious
Habitat & Ecology
• Habitat:
– All marine
• Ecology:
– Help control algae, clam, and coral population
– Sea star feeds exclusively on coral  destroy
coral reefs
Structures
Madreporite–
sieve
structure
through
which
water
Water
system
–like
system
of internal
tubes
that
carries
our
essential
Tube vascular
Endoskeleton
foot – suction-cuplike
– structural
support
structure
located
attached
inside
tothe
the
radial
body
canals;
of an
functions
such
as feeding,
respiration,
circulation,
vascular
system
of shells
an
echinoderm
opens
to the
used
animal
to walk
& open
outside and movement
Eyespot
Endoskeletal plates
Anus
Stomach
Digestive glands
Ring canal
Radial canal
Madreporite
Reproductive glands
Tube foot
Sucker
Comparing Groups and Major Characteristics of Echinoderms
Characteristic
Sea urchins
and sand
dollars
Feeding
Detritivores
Shape
Movement
Sea
cucumbers
Sea
stars
Sea lilies and
feather stars
Detritivores
Detritivores
Most
carnivores
Herbivores
Disc- or globeshaped, no
arms
Star-shaped,
arms
Cucumbershaped, no
arms
Star-shaped,
arms
Stalk with
feathery arms
Burrow in
sandy ocean
bottom or
wedge in rock
crevices using
moveable
spines
attached to
endoskeleton
Move rapidly
along ocean
floor using
arms
Move slowly
along ocean
floor using
muscular body
wall to crawl
Creep slowly
along ocean
floor using
arms
Cannot move;
attached to
ocean bottom
Brittle
stars
Phylum Chordata
What Is A Chordate?
4 characteristics present at some stage of life
1. A dorsal, hollow nerve cord (called spinal
cord in vertebrates)
2. Notochord – a supporting rod (develops
into a backbone in vertebrates)
3. Pharyngeal pouches
4. Tail that extends beyond the anus
General Chordate Structure
Notochord
Muscle Segments
Tail
Anus
Hollow Nerve
Cord
Mouth
Pharyngeal
Pouches
Nonvertebrate Chordates
• Tunicates - look nothing like
other chordates
– The larval form has all the
chordate characteristics
– The adult tunicates have
neither a notochord nor a
tail
• Lancelets are more fishlike and
have a definite head containing
a mouth