Chapter 11 study guide Flashcards
an organisms structure
anatomy
.the study of functions in organisms
physiology
one line of symmetry
bilateral symmetry
multiple lines of symmetry
radial symmetry
animals with backbones
vertebrate
animals without backbones
invertebrate
a group of animal classifaction
phylum
an immature form of an animal
larva
invertebrates that have stinging cells and take their food into a central body cavity
cnidarian
the vase-shaped body plan
polyp
the bowl-shaped body plan
medusa
a knot of nerve tissue located in the head end
brain
an organism that lives inside or on another organism
parasite
the organism in or on which a parasite lives
host
an opening in which waste exits
anus
invertebrates with soft, unsegmented bodies that are often protected by a hard outer shell
mollusk
a system in which the blood isn’t always inside blood vessals
open circulatory system
a system in which blood moves only within a connected network of those tubes called blood vessals
closed circulatory system
organs that remove oxygen from the water
gills
include snails and slugs
gastropod
a flexible organ with tiny teeth
radula
mollusks that have two shells held together by hinges and strong muscles
bilave
.an ocean-dwelling mollusk whose foot forms tentacles around its mouth
cephalopod
members of the arthropod phylum
arthropod
outer skeleton
exoskeleton
the process of shedding an outgrown exoskeleton
molting
an appendage attached to the head that contains sense organs
antenna
an arthropod that has 2 or three body sections, five or more pairs of legs, and 2 pairs of antennae
crustacean
arthropods that have 2 body sections, 4 pairs of legs, and no antennae
arachnid
the hind section
abdomen
a process in which an animals body undergoes dramatic changes in form during its lifetime
metamorphosis
the most common of all arthropods with 3 body sections, 6 legs, one pair of antennae, and usually 1 or 2 pairs of wings
insect
an insects midsection in which the legs and wings are attached
throax
what a larva becomes
pupa
a stage which usually looks like the adult insect without legs
nymph
invertebrates which an internal skeleton and a system of fluid-filled tubes called a water-vascular system
echinoderm
an internal skeleton
endoskeleton
the internal organ system of fluid-filled tubes in echinoderms
water vascular system
portions of the tubes in the water vascular system can contract, or squeeze together, forcing water into these structures.
tube feet
has 4 different stages: egg, larva, pupa, and adult
complete metamorphosis
has no distinct larval stage
gradual metamorphosis
