Invertebrate Animals Flashcards
(23 cards)
Vertebrates
An animal that has a backbone.
Invertebrates
An animal that does not have a backbone.
Consumer
An organism that eats other organisms or organic matter.
Ganglion
A mass of nerve cells.
Gut
The digestive track.
Coelom
A body cavity that contains the internal organs.
Bilateral Symmetry
The two sides of its body mirror each other.
Radial Symmetry
Its body is organized around the center, like the spokes on a wheel.
Asymmetry
Its body is not organized around the center.
Sponges
They are multi-cellular organisms that have bodies full of pores and channels allowing water to circulate through them.
Cnidarians
Some kind of animal tat lives in the sea.
Flatworms
The flat worms, are a phylum of relatively simple bilateral, unsegmented, soft-bodied invertebrates.
Roundworms
The nematodes constitute the phylum Nematode. They are a diverse animal phylum inhabiting a broad range of environments.
Mollusks
Mollusca are the second largest phylum of invertebrate animals. The members are known as mollusks or mollusks.
Open circulatory system?
Open circulatory systems (evolved in crustaceans, insects, mollusks and other invertebrates) pump blood into a hemocoel with the blood diffusing back to the circulatory system between cells. Blood is pumped by a heart into the body cavities, where tissues are surrounded by the blood.
Closed circulatory system?
Vertebrates, and a few invertebrates, have a closed circulatory system. Closed circulatory systems have the blood closed at all times within vessels of different size and wall thickness. In this type of system, blood is pumped by a heart through vessels, and does not normally fill body cavities.
Annelid worms?
The annelids, also known as the ringed worms or segmented worms, are a large phylum, with over 22,000 extant species including ragworms, earthworms, and leeches.
Exoskeleton?
An exoskeleton is the external skeleton that supports and protects an animal’s body, in contrast to the internal skeleton of, for example, a human. In usage, some of the larger kinds of exoskeletons are known as “shells”.
Compound eye?
A compound eye is a visual organ found in arthropods such as insects and crustaceans. It may consist of thousands of ommatidia, which are tiny independent photoreception units that consist of a cornea, lens, and photoreceptor cells which distinguish brightness and color.
Antenna?
one of a pair of slender, movable, segmented sensory organs on the head of insects, myriapods, and crustaceans — see insect illustration.
Metamorphosis?
A change in the form and often habits of an animal during normal development after the embryonic stage. Metamorphosis includes, in insects, the transformation of a maggot into an adult fly and a caterpillar into a butterfly and, in amphibians, the changing of a tadpole into a frog.
Endoskeleton?
an internal skeleton, such as the bony or cartilaginous skeleton of vertebrates.
Water vascular system?
The water vascular system is a hydraulic system used by echinoderms, such as sea stars and sea urchins, for locomotion, food and waste transportation, and respiration. The system is composed of canals connecting numerous tube feet.
