Life Science chapter 10

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Symmetry

The property of an object that means it can be divided by one or more imaginable lines into mirror image halves.

Notochord

A flexible rod found in chordate animals.

Vertebrate

An animal that has a backbone

Invertebrate

An animal that lacks a backbone.

Endotherm

An animal that can regulate its internal body temperature.

Ectotherm

An animal with a body temperature that is determined by its environment

baraminology

The effort to define the boundaries between the various created kinds of animals.

Sponge

One of a group of animals with no symmetry, cephalization, or gut.

Cnidarian

One of a group of animals with stinging cells, called cnidocytes, including nerve impulses

Echinoderm

One of a group of animals with spiny skin, including sea stars, sea urchins, and sea cucumbers.

Mollusk

One of a group of animals with soft bodies and usually a shell, including snails, octopuses, and clams.

Arthropod

One of a large group of animals with jointed appendages and an exoskeleton.

Exoskeleton

A support structure on the outside of the animal’s body.

Endoskeleton

A living internal support structures.

Amphibian

An ectothermic vertebrate that usually lives in water when young and on land as an adult.

Placental Mammal

A mammal that provides its embryo with oxygen and food a structure called the placenta.

Marsupial

A mammal with a pouch in which to raise its young .