Porifera Cnidaria Flashcards
Porifera animals are found in
Aquatic, generally marine but few are found in fresh water( spongila)
Porifera are
Sessile solitary colonial
Pores
Numerous mouth lets called. Ostia
One opening for exit called. Osculum
Porifera shape
Irregular shapes like flower vase cylindrical
Porifera symmetry
Exception
Asymmetrical
Radial symmetry in leucosolenia sycon
Ectoderm Porifera
Outer pinacoderm ( pinacocytes] flat cell
Endoderm (Porifera)
Inner chanoderm [coller calls or chanocytes) flagella at ed
Characteristic of Porifera
Choanocytes
Mesenchyme( Porifera)
Amoebocytes
Spongocoel also known as
Paragastric cavity with small cavitied canals
Water transport Porifera also responsible for
Food gathering, respiratory exchange removal of waste
Changestes (Porifera)
Collar cells with flagella line the spongocoel and canals
Digestion Porifera
Intracellor occurs in food vacuoles of. Choanocytes
Nutrition is holozoic
Amolboïd. cells Porifera fn
Distribution of food from collar cells to other cells is brought by movable trophocytes
Skeleton of Porifera
The body is supported by skeleton made up of spicules / spongin fibres
Skeleton is internal mesenchyme [endoskeleton]
Spicules
Spongin fibres
Scleroblasts
Spongioblasts
Respiration excretion Cnidaria
Diffusion of gases through body surface
Porifera cnidaria excretory matter
Ammonia
Sexuality of portra
Hermaphrodite