Download Phylum Porifera

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

Document related concepts

Aquatic locomotion wikipedia, lookup

Anatomy wikipedia, lookup

Regeneration in humans wikipedia, lookup

Insect physiology wikipedia, lookup

Human embryogenesis wikipedia, lookup

Precambrian body plans wikipedia, lookup

Transcript
Kingdom Animalia
Invertebrates
Phylum Porifera
Phylum Cnideria
SPONGES
Sponges
Phylum Porifera (pore-bearers)/ simplest animal
Body Symmetry/Shape: Asymmetrical
Segmentation: None
Coelom/body cavity: Acoelomates
Nervous system: No Cephalization
Skeleton/Movement: Sessile, EndoskeletonSpicules
SPONGES
Digestion: filter feeders / many pores
.Choanocytes are flagellated cells that pull food in
thru ostia (pores) and the amoebocyte cells
circulate food around the organism
Excretion: diffusion; wastes exit thru osculum
Circulation: None
Respiration: diffusion-obtain oxygen from water
Reproduction: sexual-Hermaphrodites(have
sperm & egg)-Both sexes in same organism called
monoecious: asexual- bud; Regenerate body parts
Sponge examples &Uses
Examples: natural & kitchen sponges
Uses: cleaning, bathing, & makeup application
Body structure:
A. Osculum: water exits-part of feeding
B. Pore cells (ostia): water enters-part
of feeding
C. Collar cells:(choanocytes)- line
interior, have flagella to filter out food
from water
D. Amoebocytes: carry nutrients from
collar cells to body of the sponge
E. Spicules- support/skeleton
F. Epithelial cells-”skin”support/protection
Figure 26–8 The Anatomy of
a Sponge
Section 26-2
Water flow
Osculum
Central cavity
Pores
Choanocyte(collar cells)
Spicule
Pore cell
Pore
Epidermal cell
Archaeocyte
Cnidarians
Aurelia
Portugueseman-of-war
Sea Aneome
Hydras
Phylum Cnidaria- “stinging cell”;
predators
Germ Layers: 2
Body Symmetry/shape: Radial,
2 body forms: Polyp & Medusa
Segmentation: none
Coelom: Acoelomate
Nervous: Cephalization absent;
Nerve Net-conducts impulses
Skeleton/Movement: Hydrostatic;
nematocyst: stinging cells found on tentacles;
Digestion: one body opening for food & wastes
Excretion:
Circulation: none
Respiration: oxygen diffuses into body from water
Reproduction: asexual-budding-Polyp form- ex. Hydra
sexual-Medusa form- ex. Jellyfish
regenerates body parts
Groups & Uses of Cnidarians
• 3 Groups of Cnidarians:
1. Hydrozoans: colonies which appear to be one organism
Ex: Portuguese-man-of-war
2. Scyphozoans: independent medusa forms
Ex: jellyfish, box jelly
3. Anthozoans: colonies of polyps
Ex: corals, sea anemone
Riches of the sea
Structure:The Polyp and Medusa Stages
Epidermis
Mesoglea
Gastroderm
Tentacles
Mesoglea
Gastrovascular cavity
Mouth/anus
Mouth/anus
Gastrovascular
cavity
Tentacles
Medusa
Polyp
basal disc: sticky structure at the
bottom of polyp ; sessile