Metazoans Course

Lesson 1 • Overview of Animal Diversity

Surveys the breadth of animal phyla from sponges to vertebrates. Provides a conceptual map students use throughout the course.

Lesson 2 • Defining Metazoans

Metazoans are multicellular animals with specialised tissues; this section establishes their core biological identity. Students distinguish metazoans from protists and fungi.

Lesson 3 • Evolutionary Origins of Animals

Traces the Precambrian origins of metazoans and the Cambrian explosion. Students connect fossil evidence to living lineages.

Lesson 1 • Muscle and Nervous Tissues

Introduces the contractile and signalling tissues that define animal behaviour. Prepares students for organ system and locomotion chapters.

Lesson 2 • Connective and Supportive Tissues

Covers loose connective, dense connective, cartilage, bone, and blood as tissue subtypes. Students map each tissue to structural and transport roles.

Lesson 3 • Animal Cell Structure

Reviews organelles unique or prominent in animal cells, including centrioles and lysosomes. Connects cell structure to multicellular function.

Lesson 1 • Molecular Systematics in Animals

Applies DNA sequence data and genomic markers to resolve animal relationships. Students evaluate how molecular data revises classical taxonomy.

Lesson 2 • Basal Metazoan Lineages

Examines Porifera, Placozoa, and Cnidaria as early-diverging groups that anchor the animal tree. Students identify their diagnostic traits.

Lesson 3 • Protostome Diversity

Covers Lophotrochozoa and Ecdysozoa, the two major protostome superphyla. Students distinguish spiral cleavage from moulting-based development.

Lesson 4 • Principles of Phylogenetic Analysis

Explains cladistics, synapomorphies, and parsimony as tools for reconstructing evolutionary history. Students interpret cladograms accurately.

Lesson 1 • Mollusca Diversity and Function

Explores the mantle, radula, and open vs. closed circulatory systems across molluscan classes. Students explain how the basic body plan diversified.

Lesson 2 • Arthropod Success and Diversity

Analyses the exoskeleton, jointed appendages, and compound eyes that drive arthropod dominance. Students compare major arthropod classes.

Lesson 3 • Porifera and Cnidaria

Details sponge filter feeding and cnidarian nematocysts as early animal innovations. Students link structure to ecological function.

Lesson 4 • Echinoderms and Minor Phyla

Covers echinoderm radial symmetry, tube feet, and regeneration alongside selected minor phyla. Students appreciate the breadth of invertebrate solutions.

Lesson 1 • Reptiles and Amniote Evolution

Introduces the amniotic egg and key reptilian adaptations for fully terrestrial life. Students distinguish major reptile lineages including archosaurs.

Lesson 2 • Jawless and Cartilaginous Fishes

Examines agnathans and chondrichthyans as basal vertebrates with key craniate features. Students identify the significance of jaws and cartilaginous skeletons.

Lesson 3 • Birds and Mammals

Compares avian and mammalian endothermy, reproductive strategies, and derived features. Students synthesise vertebrate evolution into a coherent narrative.

Lesson 4 • Amphibians and the Tetrapod Transition

Analyses the water-to-land transition through amphibian anatomy, physiology, and life history. Students evaluate constraints imposed by dependence on moist environments.

Lesson 1 • Respiratory Strategies

Surveys gills, lungs, tracheae, and book lungs as gas exchange solutions. Students explain how surface area and ventilation meet oxygen demand.

Lesson 2 • Digestive System Comparisons

Traces digestive complexity from gastrovascular cavities to complete alimentary canals. Students identify specialisations linked to diet.

Lesson 3 • Nervous and Endocrine Integration

Examines nerve nets, ganglia, and centralized brains alongside hormonal signalling. Students explain how integration enables coordinated behaviour.

Lesson 4 • Circulatory System Diversity

Contrasts open and closed circulatory systems, single vs. double circulation, and heart chamber evolution. Students link circulation type to metabolic demand.

Lesson 1 • Organogenesis and Body Patterning

Explains how Hox genes and signalling gradients establish the body axis and organ primordia. Students connect gene expression to morphological outcomes.

Lesson 2 • Developmental Genetics and Evo-Devo

Introduces evolutionary developmental biology, showing how changes in gene regulation produce morphological diversity. Students apply evo-devo logic to case studies.

Lesson 3 • Larval Forms and Metamorphosis

Surveys trochophore, nauplius, and pluteus larvae as phylogenetically informative stages. Students interpret metamorphosis as a developmental strategy.

Lesson 4 • Early Embryonic Development

Covers cleavage patterns, blastulation, and gastrulation as universal early developmental events. Students distinguish radial, spiral, and discoidal cleavage.

Lesson 1 • Social Behaviour and Cooperation

Applies kin selection, reciprocal altruism, and game theory to explain cooperative and competitive behaviours. Students evaluate evidence for each mechanism.

Lesson 2 • Animal Migration and Habitat Use

Covers navigation mechanisms, migratory routes, and habitat selection across taxa. Students assess how climate change disrupts migratory timing.

Lesson 3 • Animal Populations and Life History

Analyses survivorship curves, reproductive rates, and population growth models. Students predict population dynamics from life history parameters.

Lesson 4 • Feeding Ecology and Trophic Roles

Classifies animals by trophic level and feeding guild, linking diet to energy flow. Students construct simple food webs from field data.