BIOL 1720: Foundations of Biology II

School: St. Catherine University

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Videos

Cell Specialization Origins: Ectoderm, Mesoderm & Endoderm Roles

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Discover the origins of specialized cells in embryonic development and learn about the three essential germ layers: ectoderm, mesoderm, and endoderm. Explore how these layers form the foundation for all multicellular life.

Pharyngeal Slits: The Feeding Marvel in Lancelets and Tunicates

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Explore the vital roles of pharyngeal slits in lancelets and tunicates. Learn how these clefts aid in filter-feeding, capturing food particles, and evolve through different life stages.

Simplifying Phylogenetic Trees: Parsimony & Evolutionary Change

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Explore the application of parsimony in constructing phylogenetic trees, emphasizing simplicity in scientific explanations and its relation to evolutionary changes. Learn about various options for tree construction and the core concept of choosing the most parsimonious representation

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Arteries by Heart: More Endothelium, Muscle, Elastic?

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Learn about the composition of arteries focusing on those closer to the heart. Understand the role of endothelium smooth muscle fibers elastic fibers and collagen in these arterial structures. Discover why arteries near the heart have a higher percentage of elastic fibers to withstand pressure changes effectively.

Unlocking Muscle Contraction: The Pivotal Role of Calcium & Other Elem

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Explore the intricacies of muscle contraction and the pivotal role played by elements like Calcium, Sodium, Potassium, and Chloride. Learn how Calcium directly triggers contraction by interacting with troponin and actin filaments. A thorough breakdown of each element's unique contribution to our body's movement.