Chapter 9 Flashcards
organs that exchange carbon dioxide for oxygen in the water.
GILL
An inherited trait that increases an organ’s chance of surviving and reproducing ina particular environment.
ADAPTATION
A body plan in which an organism can-not be divided into any two parts that are nearly mirror images.
ASYMMETRY
A basic body plan in which the organism can be divided into approximate mirror images of each other.
BILATERAL SYMMETRY
The internal rigid framework that supports humans and other animals.
ENDOSKELETON
An animal that heats its body from heat in its environment.
ECTOTHERM
An animal that generates its body heat from the inside.
ENDOTHERM
A special tissue that produces milk for young mammals.
MAMMARY GLAND
a thick, hard outer covering; that protects and supports an animal’s body.
EXOSKELETON
A fluid-filled internal cavity surrounded by muscle tissue.
HYDROSTATIC SKELETON
a body plan in which an organism can be divided into two parts that are nearly mirror images of each other anywhere through its central axis.
RADIAL SYMMETRY
A thin layer of tissue that covers a mollusk’s internal organs.
MANTLE
It is a developmental process in which the body form of an animal changes as it grows from an egg to an adult.
METAMORPHOSIS
The process by which an outer covering such as an exoskeleton, is shed and replaced
MOLTING
An animal that survives by living inside or on another organism, gets food from the organism and does not help in the organism’s survival.
PARASITE
A protective membrane that surrounds an embryo.
AMNION
a flexible rod-shaped structure that supports the body of a developing chordate.
NOTOCHORD
Grooves along the side of a developing chordate.
PHARYNGEAL POUCH
