Biological Phyla and Body Plans

Flashcards covering key terms and concepts related to biological phyla and body plans discussed in the lecture.

Cnidaria

Diploblastic phylum known for having nematocysts used for stinging prey.

Mollusca

Eucoelomate phylum characterized by a lack of segmentation.

Echinodermata

Deuterostome phylum with an endoskeleton made of calcium-rich ossicles.

Porifera

Phylum with a cell-level organization and no true tissues.

Platyhelminthes

Acoelomate protostome phylum including flatworms.

Arthropoda

The largest and most diverse phylum, includes insects and crustaceans.

Chordata

Deuterostome phylum with bilateral symmetry as an adult.

Nematoda

Pseudocoelomate protostome phylum known for roundworms.

Annelida

Phylum including earthworms, leeches, and polychaetes, showcasing segmentation.

Hydra

A free-floating life form of jellyfish, contrasting with the sessile polyp life form.

Symmetry Types

Asymmetry, radial, bilateral, and pentaradial are the four major body symmetry types.

Endothermic

Animals that primarily control body temperature through internal mechanisms, such as mammals and birds.

Acoelomate

Organisms, like Platyhelminthes, that lack a coelom.

Pseudocoelomate

Organisms, such as Nematoda, that possess a pseudocoelom.

Eucoelomate

Organisms that have a true coelom, like Mollusca and Annelida.

Nematocysts

Specialized cells in Cnidaria used for capturing prey through stinging.

Water Vascular System

Unique system in Echinodermata used for locomotion.

Choanocytes

Cells found in Porifera that create water currents for filter feeding.

Blastopore

The opening in the early embryo, which becomes the mouth in protostomes and the anus in deuterostomes.

Centipedes

Myriapoda that are fast predators with one pair of legs per segment.

Millipedes

Myriapoda that are slow herbivores with two pairs of legs per segment.