Bio Oral Exam

Phylum Arthropoda

Characterized by exoskeleton, jointed legs, and segmented body.

Phylum Porifera

Comprises organisms that are asymmetrical, have pores, and act as filter feeders.

Phylum Echinodermata

Known for radial symmetry, tube feet, and spiny skin.

Phylum Mollusca

Defined by having a soft body, shell, and muscular foot.

Bilateral Symmetry

Body symmetry where the left and right sides are mirror images.

Asymmetrical

Type of symmetry where an organism cannot be divided into identical halves.

Radial Symmetry

Body can be divided into multiple identical sections around a central axis.

Gills in Clams

Function in respiration and feeding.

Mantle in Clams

Secretes the shell for protection.

Chelipeds in Crayfish

Claws used for defense and food capture.

Swimmerets in Crayfish

Assist in reproduction and swimming, helping to identify sex.

Sagittal Plane

Divides a body into left and right portions.

Phylum Chordata

Characterized by a notochord, dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail at some point in their development.

Closed Circulatory System

A circulatory system where blood is confined to vessels, ensuring efficient nutrient and oxygen delivery.

Open Circulatory System

A circulatory system where blood is not confined to vessels and bathes the tissues directly.

Exoskeleton

An external skeleton that supports and protects an animal's body.

Endoskeleton

An internal skeleton that supports and protects an animal's body.