last minute definitions

Captures light in microscope

Objective lenses

Collect and focuses the light from the light source onto the specimen

Condenser

Controls the amount of light, reaching the specimen this becomes important with More transparent specimens

Iris diaphragm

Small pores that formed the openings for water to flow into the SpongeBob body

Porocyte

Channel water to choanocytes

Porocyte

Creates water current

Filters food particles from water

Choanocytes

Becomes sperm during sexual reproduction (porifera)

Choanocytes

Digest food particles

Produces spicules and spongin

Totipotent cells

Amoebocyte

Becomes eggs during sexual reproduction (porifera)

Amoebocyte

Make up outer layer of sponge

Pinacocyte

Outer layer of sponge

Pinacoderm

Openings where water flows in and is formed entirely by porocytes

Ostia

these line spongocoel in asconoid sponges

Choanocytes

These are found in the radial canal in syconoid sponges

Choanocytes

These are found in the flagellated chambers in leuconoid sponges

Choanocytes

Jelly like substance that provides support for the body in Cnidaria

Mesoglea

What is the rest of the body besides Proglottids called in Cestoda

Strobila

in Cestoda what are the things that break off after eggs are fertilized called

Proglottids

Repeating body segments

metamerism

Repeating body segments are more or less the same

Homonomous

Repeating body segments are different

Heteronomous

Outer rings that separate metameres

Annuli

Thin layer tissue in which organs/nerves Can pass through

Septa

Larval stage in class polychaeta wear, the larva looks different than the adult

Trochophore larvae

Provide support to parapodia and setae

Acicula

Class Clitellata, secrete mucus sheath for eggs

Clitellum

Live within the sediment rather than on top with mouth downward

Infaunal

Use for camouflage or warning signs in Cephalopoda

Chromatophores