Exam 3 Review - Animal Classification and Anatomy

Flashcards covering major concepts in Animal Classification and Anatomy from the exam review notes.

Animals are classified in a taxonomic hierarchy that includes Domain, Kingdom, Phylum, _, Order, Family, Genus, and Species.

Class

Symmetry is used to describe the basic body plan of organisms; asymmetrical organisms don’t have a defined shape, while symmetrical organisms consist of either ____ or ____ symmetry.

radial, bilateral

In animal classification, the ectoderm gives rise to the skin and nervous tissue, while the mesoderm gives rise to and organs.

internal, muscle

In anatomy terms, superior refers to the ____, while inferior refers to the ____ of an animal.

top, bottom

Protostomes are characterized by the mouth forming from the ____ and the blastopore becomes the ______.

blastopore, mouth

A coelom is a body cavity surrounded on all sides by mesoderm, while a pseudocoelom is surrounded on one side by mesoderm and the other side by _.

endoderm

Phylum Porifera includes organisms known as sponges, which lack defined _ types and consist of specialized cell types.

tissue

Phylum Cnidaria are characterized by their _ symmetry and the presence of specialized cells called cnidocytes.

radial

Class Mollusca includes Bivalvia, Gastropoda, Cephalopoda, and Polyplacophora, and members generally possess a _ body plan.

triploblastic

Annelids are also known as _ worms and exhibit metamerism, meaning they have true segmentation.

segmented

Phylum Arthropoda is characterized by the presence of a _ made of chitin and jointed appendages.

exoskeleton

Echinoderms exhibit _ symmetry as adults and possess a water vascular system for movement and feeding.

pentaradial

Phylum Chordata includes characteristics such as a post anal tail, pharyngeal gill slits, notochord, and _ hollow nerve cord.

dorsal

Which class of Chordata are jawless, lack paired fins, and include Hagfish and Lampreys? They belong to superclass Agnatha.

Fishes

Amphibia, which are the first tetrapods, require water for _ and exhibit cutaneous respiration.

reproduction

Mammals are characterized by hair, the ability to produce ____ , and caring for young at birth.

milk

What is the defining characteristic of phylum Porifera?

Organisms in phylum Porifera are known as sponges and lack defined tissue types.

What type of symmetry do organisms in phylum Cnidaria exhibit?

Organisms in phylum Cnidaria exhibit radial symmetry.

What features do members of the class Mollusca generally have?

Members of the class Mollusca generally possess a triploblastic body plan.

What is the function of the water vascular system in echinoderms?

The water vascular system in echinoderms is used for movement and feeding.

What are the key characteristics of phylum Chordata?

Phylum Chordata includes a post anal tail, pharyngeal gill slits, notochord, and a dorsal hollow nerve cord.