BIOL 1218 - LAB 09 Invertebrates and Chordates

These flashcards cover key concepts from Lab 09 of BIOL 1218, focusing on invertebrates and chordates, including body plans, specific phyla characteristics, and evolutionary traits of chordates.

What is the main focus of Lab 09 in BIOL 1218?

Introduction to Invertebrate Phyla and Chordates, visiting stations, and discussing phyla and key characteristics.

What are the three types of animal body plans identified in the lecture?

Asymmetrical, Radial Symmetry, and Bilateral Symmetry.

What is the defining characteristic of Phylum Porifera?

Porifera, known as sponges, have an asymmetrical body plan and lack true tissues and organs.

What type of symmetry do Cnidarians exhibit?

Cnidarians exhibit radial symmetry and have a gastrovascular cavity with a single opening.

What defines the digestive system of Platyhelminthes?

Platyhelminthes (flatworms) have an incomplete digestive system with a single opening.

What are the main parts of a molluscan body plan?

A muscular foot, a visceral mass, and a mantle.

How are arthropods characterized?

Arthropods have jointed appendages and an exoskeleton.

What unique system do echinoderms possess?

Echinoderms have a water vascular system.

What are the four common derived characteristics of chordates?

Notochord, dorsal hollow nerve cord, pharyngeal (gill) slits, and a muscular post-anal tail.

What is the function of the pharyngeal slits in chordates?

Function as suspension-feeding and respiratory devices, modified for gas exchange in some vertebrates.

What distinguishes the dorsal, hollow nerve cord in chordates?

It is unique to chordates as other phyla generally have solid nerve cords located ventrally.

What is the significance of the notochord in chordates?

Provides support and is surrounded by a more complex skeleton in vertebrates.