This Class or organisms illustrates why the term "invertebrate" is a term of convenience, and not a taxon. Chordata is the Phylum.

This group of amphibians contains frogs and toads.

An organized area of the brain supporting high-level function.

This type of muscle is involuntary, and lines the respiratory, digestive, and circulatory systems.

This is the cartilaginous tube which connect the pharynx and larynx to the lungs.

These are jawless fish.

This group of reptiles contains turtles, terrapins, and tortoises.

A mammal whose young hatch from soft eggs and suckle milk from pores on their mother's skin.

This is composed of grey matter, is divided into left and right hemispheres, and controls all voluntary actions.

This is the first section of the small intestine, proceeding from the stomach. It is 10-15 inches long, and contains enzymes which chemically break down food.

An organism that does not produce it's own body heat. Cold-blooded.

The process of drying out.

Gives birth to live young.

This chamber of the heart pumps oxygenated blood to the body.

These filter blood, remove waste, regulate pH and general hydration of the body, and produce urine.

An egg-laying organism.

This is the first group of organisms to evolve a four-chamberedd heart.

The human body's largest organ.

This pea-sized "master gland" controls the function of many other glands.

This type of cell engulfs or "eats" pathogens, much like Pac-Man.

This group contains all living amphibians.

An organ which produces various sounds or pitches to produce a call in birds.

Produces stem cells.

The portion of a neuron which sends a signal from the cells body towards a synapse.

A mouth to anus tune.