Invertebrates Flashcards
(24 cards)
Animals that have a back bone
vertebrates
animals that don’t have a backbone
Invertebrates
A person or thing that eats or uses everything
Consumer
A group of nerve cells
Ganglion
the stomach or belly
Gut
located in between the intestinal canal
coelom
the property of being divisible into symmetrical halves on either side of a unique plane
Bilateral Symmetry
symmetry around a central axis
Radial Symmetry
lack of equality or equivalence between parts or aspects of something
Asymmetry
a primitive sedentary aquatic invertebrate
Sponges
an aquatic invertebrate animal
Cnidarians
a worm of a phylum that includes the planarian
Flatworms
a nematode, especially a parasitic one found in the intestines of mammals
Roundworms
an invertebrate of a large phylum that includes snails, slugs, mussels, and octopuses
Mollusks
Blood is pumped by a heart into the body cavities, where tissues are surrounded by the blood.
Open circulatory system
have the blood closed at all times within vessels of different size and wall thickness.
Closed circulatory system
A large phylum that comprises the segmented
Annelid worms
each of the parts into which something is or may be divided.
Segment
a rigid external covering for the body in some invertebrate animals
Exoskeleton
an eye consisting of an array of numerous small visual units
Compound eye
either of a pair of long, thin sensory appendages on the heads of insects
Antenna
a change of the form or nature of a thing or person into a completely different one
Metamorphosis
an internal skeleton, such as the bony or cartilaginous skeleton of vertebrates.
Endoskeleton
a network of water vessels in the body
Water vascular system
