Invertebrates Flashcards
(23 cards)
Vertebrates
Animal that has a backbone
Invertebrates
Animals with no 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
When 2 sides of the body mirror each side
Radial symmetry
A body organized around the center. Like spokes on a wheel
Asymmetry
You cannot draw a straight line through the middle to divide each side identical
Sponges
simplest invertebrates they have asymmetrical bodies and have no tissues, gut, or neurons
Cnidarians
Animals that have stinging cells
Flatworms
bilateral symmetry with 2 defined large eye spots even though they cannot see they can define light
Roundworms
bilateral symmetry they have a simple nervous system which consists of a ring of ganglia
Mollusks
Snails,slugs,clams, oysters,squids, octopuses
Open circulatory System
a circulatory system in which the circulatory fluid is not contained entirely within vessels
Closed circulatory system
a circulatory system in which the heart circulates blood through a network of blood vessels that form a closed loop
Aneelid worms
any worms of the phylum annelida
exoskelition
a rigid external covering for the body in some invertebrate animals
compund eye
an eye consisting of an array of numerous small visual units
anteena
either a pair of long thin sensory appendages on the heads of insects
metamorphisis
the process of transformation from an immature form to an adult
endoskelition
an interal skeleton such as a bony or cartilaginous skeleton of vertebrates
water vascular system
a network of water vessels in the body
