Biology Terms for invertebrates.
no definite shape; cannot be divided into equal parts | ||
have body parts arranged around a central axis; round | ||
body design in which there are equal right & left halves | ||
sensory organs & nerves located near the front or head region | ||
thin projections of tissue that are rich n blood vessels that allow for gas exchange | ||
heart pumps blood throughout the body through a series of blood vessels | ||
heart pumps blood into a body cavity without the use of vessels | ||
cavity is filled with water to act as a support system | ||
rigid external skeleton on the outside of an animals body | ||
skeleton composed of a hard material such as bone that helps support an animals body | ||
animal that possesses both male & female reproductive parts | ||
egg & sperm unite outside the female's body | ||
egg & sperm unite inside the female's body | ||
animal that does not possess a backbone | ||
organism that does not move throughout its life & stays in one place |