Invertebrates #1 Flashcards
List the characteristics of animals
1.Heterotrophs by ingestion 2.Multicellular 3.Aerobic 4.Motile 5.Reproduces sexually or asexually.
Explain Heterotrophs by ingestion in animals
Animals eat food by taking it into their bodies
Explain multicellular in animals
All animals are multicellular. Animal cells are all eukaryotic and lack a cell
wall
Explain Aerobic in animals
Oxygen is needed for respiration. Oxygen is taken by gills, lungs, skin surfaces or combination
Explain motile in animals
All animals are capable of movement at some point in their lives either as an embryo,
a larva, or as an adult.
Explain sexual reproduction in animals
- Some reproduce only sexually like human
- Some asexually
- Some either depending on situation
What does phylum porifera mean?
“pore bearing” animals
What major characteristics do phylum porifera they have?
-
Primitive
• Filter feed
• calcareous or siliceous
spicules
• Some have spongy spongin instead of spicules
• Sessile
• asymmetrical
What does asymmetrical mean?
no body symmetry
Sponges are in what type of water?
marine, one freshwater
What type of body structure do phylum porifera have?
many incurrent pores leading to internal cavities and fewer excurrent pores
What do incurrent pores do in phylum porifera?
Water brings oxygen and food
What do excurrent pores do?
carries out waste
The interior body cavities of phylum porifera are lined with special cells called?
collar cells
What have a flagellum and a collar for filtering out food?
collar cells
The body of a sponge can be…
rigid, spiny, velvety or spongy
What phylum has microscopic spicules imbedded in their body walls?
phylum porifera
The spicules in phylum porifera can be made of what two materials?
calcareous or siliceous
Calcareous is made of what?
calcium carbonate
What is siliceous made of?
silica
Some sponges lack spicules and instead have a “spongy” fibrous skeleton made of what?
spongin
Define sessile
permanently cemented to the sea floor
What are two main growth forms of phylum porifera?
erect and encrusting
Name this
siliceous spicules