SCIENCE: Chapter 18 vocab Flashcards
a body plan in witch an organism can be divided into two parts that are nearly mirror images of each other
bilateral symmetry
a body plan in witch an organism can be divided into two parts that are nearly mirror images of each other anywhere through the central axis
Radial symmetry
a body plan in which an organisms cannot be divided into any two parts that are nearly mirror
Asymmetry
an inherited trait that increases an organisms chance of survIving and reproducing in a particular environment
Adaptation
a fluid-filled internal cavity surrounded by mussle tissues
Hydrostatic scelatoton
a thick hard hard outer covering protects and supports an animals body
Exoskeloton
the internal ridged framework that supports human and other animals
Endoskeloton
an animal that survived by living inside or on another organism gets food from the organism and does not help the other organism survive
Parasites
a thin layer of tissues that covers a mollusks internal organs
.mantle
a process in which an outer layer covering such as an exoskeleton is shed and replaced
Molting
a developing mental process in which the body form of an animal changes as it grows from an egg to an adult
Metamorphosis
a flexible rod shaped structure that supports the body of a developing chordate
Notochord
grooves along the the side of a developing chordate
Pharyngeal pouch
an organ that exchanges carbon dioxide for oxygen in the water
Gill
a protective membrane that surrounds an embryo
Amnion
an animal that heats its body from heat in its enviroment
Ectotherm
an animal that generates its body heat from the inside
Endotherm
special tissue that produces milk for young mammals
Mammary gland
