Download Phylum Cnidaria

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

page
1
page
2
page
3
page
4
page
5
page
6
page
7
page
8
page
9
page
10
page
11
page
12
page
13
page
14
page
15
page
16
page
17
page
18
page
19
page
20
page
21
page
22
page
23
page
24
page
25
page
26
page
27
Document related concepts
no text concepts found
Transcript 
Chapter 24 and 25
Sponges,
Cnidarians,
Flatworms, and
Roundworms
Phylum Porifera (“pore-bearer”)
~Includes all
sponges (grantia,
scypha, &
leucosolenia)
Basketball sponge
Cinachyra sponge
• Simplest animals
• Asymmetrical
Knob sponge
Phylum Porifera



Aquatic
Sessile - can’t move
from place to place
Filter feeders
Volcano sponge
Red sponge
Phylum Porifera

Reproduce both
sexually and…
 Asexually
* Regeneration –
reattach
* Budding - grow
new sponges
Dead man’s finger sponge
Phylum Porifera

Hermaphrodites produce both eggs
and sperm
Phylum Porifera
Sponge dumping gametes
Phylum Porifera

Osculum - opening on some
sponges
 Spicules - sharp, hard, needlelike structures - attachment
Phylum Cnidaria
(“nettles” / tentacles)
Includes jellyfishes, corals,
sea anemones & hydras
Brain coral
Green anemone
Jellyfishes
Phylum Cnidaria

Aquatic
 Radial symmetry
Flower pot coral
Purple anemone
Phylum Cnidaria

Nerve net - a simple
nervous system
Torch coral
Sun coral
Nematocysts
- tubes in
tentacles - contains poison
Gastrovascular
cavity primitive stomach
Monterey, CA
Phylum Cnidaria

Two basic body forms


Polyp - tube shaped body
Medusa - body shaped
like an umbrella
Red cauliflower coral
Medusa
Moon
jelly
Sea anemone
Club tipped anemone
Pineapple coral
Staghorn coral
Corals
Reproduce:
Sexually
- hermaphrodites
Asexually - budding
Budding hydra
Hydra releasing an egg
Hydra releasing sperm
PHYLUM: PLATYHELMINTHES
(“flat worms”)

Includes:



Tapeworms & liver flukes
(Parasitic)
Planarians (Free-living)
Bilateral symmetry
(PHYLUM: PLATYHELMINTHES)

Some have eyespots
 Scolex - head of a
tapeworm
 Proglottid - body part
LIFE CYCLES:
May involve two or more hosts.
• Most have
digestive systems
Exception:
Tapeworms
(TAPEWORM
LIFE CYCLE)
Life Cycle of
a Liverfluke
PHYLUM: NEMATODA
(“Thread” / Roundworms)
PHYLUM: NEMATODA

Includes:





Ascaris (Roundworms)
Pin worms
Trichina worms
Hookworms
The above are parasitic
 Most are free-living
PHYLUM: NEMATODA

Bilateral
symmetry
 Some are
hermaphrodites
LIFE CYCLE OF A
ROUNDWORM
PARASITIC WORMS
WORM
HOW
ACQUIRED
INVADES
Tapeworm /
Roundworm
Eating raw meat Intestines
Hookworm
Walking barefoot Lungs
Liver fluke
Eating raw fish
Liver
Trichina worm
Eating raw pork
Muscles
Related documents