Animalia Flashcards
Porifera
Calcarea- calcium carbonate spines ( Leucosolenia)
Hexactenellida-Silica spicules (Euplectella)
Demospongiae-Sponging spicules
Animalia Characteristics
Multicellular, Hetereotrophic eukaryotes
Reproduce sexual (most) and asexual few phyla
Animals cells lack cell wall
Are capable of motion in some stages of their lives.
Respond quickly to external stimuli bc of nerve cells, muscles or contractile tissues .
Cnidaria
Hydrozoa-Hydra (polyp form)
Scyphozoa-(jelly fish-medusa form)
Cubozoa (box jellies) (very deadly , poisonous tentacles)
Anthozoa (Corals and sea anemone)
Platyhelminthes
Flatworm
Tapeworm
Characteristics of Porifera
Multicellular, mostly marine
Bodies are perforated by pores
Porifera organisms have stiff skeleton
Skeleton made up of spicules and collagen
Filter feeders-they feed through the pores in their outer wall
Eat tiny particles ex. Bacterial plankton that they filter from water flowing through them.
Definition of CHOANOCYTES
Flagellated cells lining interior body of spongocoel. Water transport inside body
Def. AMOEBOCYTES
Are embedded in mesophyl. They move with PSEUDOPODIA ,digest food, carry nutrients, and produce spicules
What are spicules made of?
Are made up of calcium carbonate, silica or spongin.
Def. PSEUDOPODIA
a temporary protrusion of the surface of an ameboid cell for movement and feeding.
Characteristics of Cnidaria
Aquatic animals Radial symmetry Mouth is surrounded by the tentacles Tentacles used for feeding,protection and attachment Presence of primitive Nervous system Ex. Hydra
Dipoblastic animals
Two layers of cells
Epidermis and gastrodermis with a jelly like mesoglea between them.
Food is taken through a mouth into the gastro vascular cavity.
Animals in phylum Cnidaria show….
Polyp- (sessile) ex hydra
Medusa - ( free living) ex jelly fish
Platyhelminthes-(ex: Flatworm)
Elongated,flattened and bilateral symmetrical
Body contains no internal cavity
Absence of circulatory and respiratory organs, flow of oxygen and nutrients by diffusion.
