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Animalia
Introduction to Animalia, Sponges and Cnidaria
72
Biology
10th Grade
03/16/2009

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Term
Animalia
Definition
The kingdom of eukaryotic, multicellular, ingestive heterotrophs
Term
Ingestive Heterotroph
Definition
Gets food by eating
Term
Symmetry
Definition
The ability to split an object or organism along a plane to get mirror images on either side of the plane
Term
Support
Definition
The means to keep an organism’s shape
Term
Hydrostatic
Definition
A support system based on water
Term
Exoskeleton
Definition
A support system with the skeleton on the outer surface with muscles inside
Term
Endoskeleton
Definition
A support system with the skeleton on the inside
Term
Direct diffusion
Definition
This method of transferring material uses only the cell membrane as the exchange surface; often requires aquatic surroundings
Term
Open Circulation
Definition
Blood or body fluids are not pumped through vessels; uses a box heart and a main body chamber
Term
Closed Circulation
Definition
Blood or body fluids are pumped through vessels using a heart
Term
Heart
Definition
A chambered device used to circulate fluids through vessels
Term
Blood Vessels
Definition
Tubes through which body fluids can be circulated
Term
Stimulus Response
Definition
The ability to react to some form of input
Term
Chemical response
Definition
Simplest form of reaction; response is to material dissolved in the organism’s surroundings
Term
Nerve net
Definition
This is a loose pattern of nerves over an organism’s body
Term
Ganglion
Definition
Also called a nerve-knot; miniature brain
Term
Brain
Definition
A large collection of nerves that processes information to a higher degree than a ganglion
Term
Excretion
Definition
The system for releasing nitrogen containing wastes like urea and ammonia
Term
Flame Cells
Definition
Individual cells on flatworms that do excretion
Term
Nephridia
Definition
“Miniature” kidney in segmented worms
Term
Malpighian Tubules
Definition
Excretion structure for insects
Term
Kidney
Definition
Most complex excretory structure; used by all vertebrates
Term
Respiration
Definition
Process for exchanging carbon dioxide for oxygen
Term
Spiracles
Definition
Small openings on the abdomen of insects for breathing
Term
Gills
Definition
These respiratory structures are found in most aquatic animals
Term
Lungs
Definition
All terrestrial vertebrates use these structures in adulthood
Term
Tidal Breathing
Definition
This method of breathing mixes fresh air with previously inhaled air
Term
Flow-through breathing
Definition
This method of breathing is the most efficient system but requires hollow bones with air-sacs
Term
Digestion
Definition
Process of ingesting, breaking down, absorbing nutrients and getting rid of wastes
Term
Filter-feeding
Definition
This system of food-getting passes large amounts of water through the animal’s body to extract a small amount of food
Term
One-opening Digestion
Definition
Food enters and wastes exit through the same opening
Term
Flow-through Digestion
Definition
Food enters and wastes exit through different openings
Term
Accessory Organs
Definition
These structures help digestion to occur but food doesn’t pass through them
Term
Reproduction
Definition
The ability to produce offspring
Term
Hermaphrodite
Definition
An organism with both male and female parts
Term
Separate Sexes
Definition
Male and females are in distinctly different forms
Term
Budding
Definition
A means of making offspring by producing a “bump” which grows into a duplicate of the original
Term
Fragmentation
Definition
This process results in duplicate organisms from broken bits of the original parent
Term
Embryonic
Definition
Offspring looks much like adult only smaller
Term
Larva
Definition
This form of offspring looks very different from its parent
Term
Radial Symmetry
Definition
A form of symmetry that has multiple planes of division
Term
Pentaradial Symmetry
Definition
A form of symmetry that has five planes of division
Term
Bilateral Symmetry
Definition
A form of symmetry that has only one plane of division
Term
Porifera
Definition
The Phylum of Sponges
Term
Spicules
Definition
Support structures for sponges; fragments that can be made of spongin/ collagen, calcium carbonate or silica
Term
Ostia
Definition
Incurrent pore
Term
Osculum
Definition
Excurrent pore
Term
Amoebocyte
Definition
This movable cell distributes food throughout a sponge’s body
Term
Choanocyte
Definition
Also called the collar cell, this flagellated cell creates the water current through the sponge; also catches food particles
Term
Spongocoel
Definition
The body cavity of a sponge
Term
Cnidarian
Definition
Stinging celled animal
Term
Ectoderm
Definition
Outer tissue layer
Term
Endoderm
Definition
Inner tissue layer
Term
Medusa
Definition
“Jellyfish” form of cnidaria
Term
Polyp
Definition
“Anemone” form of cnidaria
Term
Gastrovascular Chamber
Definition
The body cavity of a cnidarian; simple stomach
Term
Tentacle
Definition
Covered with stinging cells, these catch prey for cnidaria
Term
Nematocyst
Definition
Stinging cells
Term
Pedal Disc
Definition
The base of a polyp that can secrete a calcium carbonate substrate
Term
Gonads
Definition
Organs that produce gametes
Term
Testis
Definition
Gonad that makes sperm
Term
Ovaries
Definition
Gonad that makes eggs
Term
Cephalic
Definition
Concerning the head
Term
Caudal
Definition
Concerning the tail
Term
Anterior
Definition
Towards the front; forward
Term
Posterior
Definition
Towards the rear
Term
Dorsal
Definition
Along the back or upper surface
Term
Ventral
Definition
Along the underside or lower surface
Term
Lateral
Definition
Pertaining to the side
Term
Medial
Definition
Towards the center or middle
Term
Midline
Definition
Divides right from left
Term
Transverse
Definition
Crosses perpendicular to midline
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