Invertebrate Animal Flashcards
(23 cards)
Vertebrates
have a backbone
Invertebrates
do not have a backbone
Consumer
an organism that eats other organisms or organic matter
Ganglion
a mass of nerve cells
Gut
the digestive tract
Coelom
a body cavity that contains the internal organs
Bilateral Symmetry
two sides of the body that are mirror to each other
Radial Symmetry
its body is organized around the center like spokes on a wheel
Asymmetry
you cannot draw a straight line to divide its body into two or more equal parts
Sponges
simplest invertebrates
Cnidarians
are more complex than sponges. Have complex tissues and a gut for digesting food
Flatworms
all flatworms have bilateral symetry
Roundworms
most species of roundworms are very small
Mollusks
most mollusks fit into 3 classes
Open circulatory system
a circulatory system in which the circulartory fluid is not contained entirely within vessels
Closed circulatory system
in which the heart circulates blood through a network of blood vessels form a closed loop
Annelid worms
are often segmented worms
Exosceleton
is the external skeleton that supports and protects an animal’s body, in contrast to the internal skeleton
Compound Eye
an eye consisting of an array of numerous small visual units, as found in insects and crustaceans
Antenna
either of a pair of long, thin sensory appendages on the heads of insects, crustaceans, and some other arthropods
Metamorphosis
Also called transformation. A change in the form and often habits of an animal during normal development after the embryonic stage.
Endoskeleton
an internal skeleton, such as the bony or cartilaginous skeleton of vertebrates
Water vascular system
used by echinoderms, such as sea stars and sea urchins, for locomotion, food and waste transportation, and respiration
