Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
40 Cards in this Set
- Front
- Back
|
the property of symmetry about an axis as demonstrated by starfish
|
radial symmetry
|
|
|
left and right sides are mirror images in this form of symmetry
|
bilateral symmetry
|
|
|
attached to a substrate or unable to move
|
sessile
|
|
|
capable of self-propelled movement
|
motile
|
|
|
having both male and female reproductive organs
|
hermaphrodite
|
|
|
a form of animal sexual reproduction in which a sperm cell is united with an egg cell within the body of the female of the species
|
internal fertilization
|
|
|
a method of reproduction most common in aquatic organisms during which the gametes (egg and sperm) unite outside the body
|
external fertilization
|
|
|
the evolutionary process by which sensory organs move to the head region
|
cephalization
|
|
|
of or near the head end or toward the front plane of the body
|
anterior
|
|
|
The back of the body or situated nearer the back of the body
|
posterior
|
|
|
refers to the back of an organism
|
dorsal
|
|
|
toward the front of the body
|
ventral
|
|
|
the state of extreme dryness, or the process of extreme drying
|
dessication
|
|
|
The internal structure or skeleton
|
endoskeleton
|
|
|
An external protective or supportive covering
|
exoskeleton
|
|
|
the substance aquatic organisms rely on but takes a lot of water to dissolve
|
ammonia
|
|
|
both ideal substances for excretion because each is dissolved easily by water
|
urea and uric acid
|
|
|
tubes that waste water passes through that recover essential salts lost during excretion
|
nephridia
|
|
|
as surface area increases volume does what? what eventually happens to the ratio between the two?
|
it increases as well so eventually the ratio gets smaller
|
|
|
A specialized network of vessels for the circulation of fluids throughout the body tissue of an animal
|
vascular system
|
|
|
Fluid-filled cavity within the body of an animal
|
coelom
|
|
|
An early stage in the development of a fertilized egg
|
zygote
|
|
|
an embryo at the stage of development in which it consists of usually one layer of cells around a central cavity, forming a hollow sphere
|
blastula
|
|
|
the fluid-filled cavity inside a blastula
|
blastocoel
|
|
|
an opening into the archenteron during the embryonic stages of an organism
|
blastopore
|
|
|
area that forms guts and internal organs
|
endoderm
|
|
|
area that forms skeleton and muscles
|
mesoderm
|
|
|
area that forms the epidermis and nervous system
|
ectoderm
|
|
|
Body lacks a coelom, solid except for crude internal pouch or GVC
|
Acoelomate
|
|
|
Coelom is actually a fluid-filled remnant of the blastocoel
|
pseudocoelomate
|
|
|
Coelom is formed from the mesoderm, and lined by mesodermal membranes
|
eucoelomate
|
|
|
in this type of organism, the blastopore becomes the mouth, anus opens opposite the mouth later on
|
protostome
|
|
|
the type of division that takes place in the development of a protostome embryo
|
spiral cleavage
|
|
|
protostomes possess _________ cells in which the cell's fate is set earbly on
|
determinate
|
|
|
protosomes also possess ________ where the coelom forms as a split in the mesoderm
|
schizocoels
|
|
|
in this type of organism, the blastopore becomes the anus, mouth opens opposite the anus later on
|
deuterostome
|
|
|
this type of division takes place in the development of a deuterostome embryo
|
radial cleavage
|
|
|
deuterostomes possess ______ cells in which the cell's fate is not set early on
|
indeterminate
|
|
|
deuterostomes possess _______ as their coelomic body plan
|
enterocoels
|
|
|
the body's shape is maintained by an incompressible fluid
|
hydrostatic skeleton
|
