Transcript Phylum Porifera - Cloudfront.net

2/17/15
Discussion Questions
Using your textbook, journal, handouts, or smart phone please
complete the following:
1. Please compare and contrast Phylum Porifera and
Phylum Cnidaria
Reminders
Animal Exam 3-11-15
Root word quiz 3-10-15
Phyla Books due the day of the test - 3-11-15
Zoo Trip 3-4-15
Go to room 1135 Tues or Thurs for Science Peer Tutoring
during PLC
QUIZ
Clear your desks of everything
Do NOT write on the quiz please
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 PLC
Flip it over when you are finished and hang on to it
Today’s Objective:
OBJECTIVES: Describe and Explain the characteristics
of Phyla Porifera and Phylum Cnidaria
Phylum Porifera
“Sponges”
Osculum
Choanocytes
– cells leaves
that usethrough
a flagellum
to hole
moveat
a
Osculum – water
this
steady current of water through the sponge; also
toplike
ofmiddle
the sponge
trap food &the
digestion
process
Amoebocytes
Mesenchyme
––begin
cells
jelly
that
complete
layer
digestion
where of food
Choanocyte
Mesenchyme
particles & transfer nutrients throughout
the sponge;
amoebocytes pick upEpidermis
nutrients
also help make spicules
Spicule – spike-shaped structure that makes up the
skeletons of harder sponges; made of either chalklike
Amoebocyte
calcium carbonate of glasslike silica
Pore
Spicule
Central Cavity
Porifera – General Characteristics




Multicellular
Heterotrophic – filter feeder
Lack symmetry
Matrix – mass of cells
Feeding Method
1.
Brought in by choanocytes (collar
cells) & digestion begins
intracellular (inside cell)
2.
Choanocytes release nutrients
into mesenchyme
3.
Amoebocytes pick up nutrients,
complete digestion, deliver
nutrients to the sponge, & pick up
wastes
4.
Waste removed by pores
Reproduction

Asexual – budding


Gemmules – group of amoebocytes surrounded
by a protective layer; these form when
environmental conditions are harsh
Sexual – can produce egg and sperm, but
CANNOT self fertilize
http://www.youtube.com/watch?v=mVavqt
4Sbyo
Habitat

Live attached to sea floor (sessile)
Ecology


Some photosynthetic
Provide habitats for other marine animals
Phylum Cnidaria
Cnideria - Structures/Functions
Tentacles
Polyp Disc
Basal
Medusa
Epidermis
Mesoglea
Gastrodermis
Gastrovascular
- sessile
- –-motile
–-arm-like
jelly
outer
used
– Cavity
cnidarian
inner
like
(free-swimming)
layer
tostructures
layer
attach
layer
-ofinterior
with
body
between
ofa body
polyp
mouth
around
wall
of wall
toup
Tentacles
cnidarian
inner
mouth,
rock &orouter
armed
with
water
hollow
mouth
layers
plant
with body
down
of body
cnidocytes
Mouth
G. Cavity
Epidermis
Mesoglea
G. Cavity
Mouth
Tentacles
Epidermis
s
Gastrodermis
Gastrodermis
Basal Disk
Polyp
Medusa
Cnideria - Structures/Functions

Cnidocyte - stinging cell;
used to stun/ paralyze
prey

Nematocyst – small
barbed stinging structure
to capture prey
Cnideria – General Characteristics




Multicellular
Radial symmetry
Tissues – network of nerve cells
Acoelomate
Cnideria – Feeding Method

Tentacle with cnidocytes paralyze prey


Tentacles move food into mouth then into
gastrovascular cavity
Cnideria – General Characteristics

Enzymes digest the food

Cells engulf digested food

Undigested food passes out through mouth
Cnideria – Reproduction

Asexual – budding or regeneration

Sexual

Hermaphroditic - produce both egg & sperm,
but CANNOT self fertilize
Cnideria – Habitat & Ecology
Habitat

Most marine; few fresh water
Ecology

Balance the amount of smaller living things living in
water

Provide cleaner water

Help create coral reefs & biodiversity
Power Point Analysis
for Animals
New Groups
Work on the animal handouts you picked up at the
door today and those from Fri. Work on your
Animal Phyla Booklet (booklet will not go in your
journal)….everything else will as usual.