Studied by 3 people
Blastula
Hollow ball of cells
Blastopore
opening in blastula
Protostome
blastopore gives rise to mouth
Deuterostome
blastopore gives rise to anus
Endoderm
forms digestive and respiratory systems
Mesoderm
forms muscular, reproductive, circulatory, and excretory systems.
Ectoderm
forms nervous and integumentary systems
Coelom
Body cavity lined with mesoderm, providing space for internal organs
Pseudocoelomate
partially lined with mesoderm
Acoelomate
lack coelom between body wall and digestive tract
Coelomate
Complex animals have true body cavity completely lines with mesoderm
Germ Layers
The three primary layers in animal embryos that give rise to different tissues and organs
Triploblastic
three tissue layers
Diploblastic
two tissue layers
Dioecious
Species with separate male and female individuals
Monoecious
Species with both male and female reproductive organs in the same individual
Cephalization
concentration of sense organs and nerve cells
Pinacocytes
line the outer surface
Porocytes
regulate water circulation
Mesohyl
jellylike layer of cells under pinacocytes
Mesenchyme cells
amoeboid cells that function for reproduction, transporting and storing food
Choanocytes
collar cells that line the inner chamber
Spicules
needle like spikes for easier reproduction and catching prey
Spongin
fibrous material made of collagen
Ascon
vase like body form
Sycon
body form where walls appear folded
Leucon
body form with extensively branched canal system
Gemmules
asexual reproduction through gemmules
Epidermis
outer layer of the body wall
Gastrodermis
inner layer of the body wall
Mesoglea
between epidermis and gastrodermis
Cnidocytes
stinging cells of cnidarians
Cnida
organelle that contains the hollow tube filled with the stinging cells
Nematocysts
specialized cnidarians that are used for food, defense, and delivering a paralyzing toxin
Gastrovascular cavity
digestion, exchange of gases and waste, discharge of gametes
Planula larva
free-swimming larva
Gastrozooid
polyp in charge of capturing and digesting food
Gonozooid
budding polyps form medusae
Comb rows
comb jellies use them for movement
Colloblasts
adhesive cells, like superglue
Nerve cord
Notochord
Flexible rod of tissue providing support in chordates, functioning as a precursor to the vertebral column
Pharyngeal pouch/slit
gills or pharynx
Sessile Movement (Polyps)
use water currents to move
Free Swimming (Medusae)
have the ability to move themselves
Animal Kingdom Traits
Multicellular, Heterotrophic, Eukaryotic, Lack Cells Walls
Advantage to body cavity
room for specialized organs
Cnidarians
corals, sea anemones, and jellyfish. 2 tissue layers, diploblastic.
Ctenophores
Comb jellies
Radial
Body parts extend outward from the center
Bilateral
Body parts have identical left and right sides
Asymmetrical
no symmetry
All Chordates have this
Dorsal hollow nerve cord, Notochord, tail, Pharyngeal pouch
Note 
Flashcard (24)