Invertebrates

Front

What is an open circulatory system?

Back

A system in which blood is not contained in vessels but spreads over the organs.

Front

What are appendages?

Back

Structures that grow out from the body, such as arms or legs.

Front

What is the water vascular system in echinoderms?

Back

A system that allows echinoderms to move, eat, get oxygen, and get rid of wastes.

Front

What is a polyp?

Back

A body plan that is shaped like a tube or vase, commonly found in cnidarians.

Front

What is bilateral symmetry?

Back

A body plan where an animal has identical body parts on both sides of its body.

Front

What is radial symmetry?

Back

A body plan where body parts are arranged around a central axis, like in jellyfish.

Front

What is asymmetrical form?

Back

A body plan where an organism does not have a symmetrical shape.

Front

What are spicules?

Back

Small, needle-like structures found in some invertebrates, providing support.

Front

What is molting?

Back

The process of shedding an old exoskeleton to allow for growth in arthropods.

Front

What is a cephalothorax?

Back

A body region found in some arthropods, combining the head and thorax.