invertebrates Flashcards
(23 cards)
Vertebrates
an animal that has a backbone
Invertebrates
an animal that has no backbone
Consumer
an organism that eats meat other organisms or organic matter
Ganglion
a mass of nerve cells
Gut
the digestive tract
coelom
a body cavity that contains the internal organs
open circulatory system
a circulatory system in which the circulatory fluid is not entirely contained
closed circulatory system
a circulatory system in which the heart circulates through a network of blood vessels that form a closed loop
compound eye
an eye composed of many light detectors
exoskeleton
a hard external supporting structure
antenna
a feeler that is on the head of an invertebrate such as a crustacean
endoskeleton
an internal skeleton made of bone of cartilage
water vascular system
a system of canals filled with a watery fluid that circulates throughout the body of an echinoderm
coelom
the body cavity in metazoans, located between the intestinal canal and the body wall.
. Bilateral Symmetry
: symmetry in which similar anatomical parts are arranged on opposite sides of a median axis so that only one plane can divide the individual into essentially identical halves
Radial Symmetry
symmetry around a central axis, as in a starfish or a tulip flower.
Asymmetry
lack of equality or equivalence between parts or aspects of something; lack of symmetry.
Sponges
Sponges, the members of the phylum Porifera, are a basal animal clade as a sister of the Diploblasts. They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them, consisting of jelly-like mesohyl sandwiched between two thin layers of cells.
Cnidarians
an aquatic invertebrate animal of the phylum Cnidaria, which comprises the coelenterates.
flatworms
The flatworms, flat worms, Platyhelminthes, or platyhelminthes are a phylum of relatively simple bilaterian, unsegmented, soft-bodied invertebrates.
Roundworms
The nematodes or roundworms constitute the phylum Nematoda, with plant-parasitic nematodes also known as eelworms. They are a diverse animal phylum inhabiting a broad range of environments.
Mollusks
mollusca is the second-largest phylum of invertebrate animals after the Arthropoda. The members are known as molluscs or mollusks. Around 85,000 extant species of molluscs are recognized.
Metamorphosis
(in an insect or amphibian) the process of transformation from an immature form to an adult form in two or more distinct stages.
