Embryology Course

Lesson 1 • Cell Biology Review for Embryologists

Reviews organelles, cytoskeleton, and cell signaling relevant to development. Bridges general cell biology to embryo-specific processes covered throughout the course.

Lesson 2 • History and Scope of Embryology

Traces embryology from ancient observations to modern molecular approaches. Contextualizes why historical milestones shaped current research paradigms.

Lesson 3 • Genetics and Epigenetics in Development

Introduces genomic organization, mutation types, and epigenetic marks controlling gene activity. Provides the genetic framework needed for understanding developmental regulation.

Lesson 1 • Spermatogenesis and Sperm Structure

Details mitotic amplification, meiotic divisions, and spermiogenesis producing mature sperm. Connects sperm ultrastructure to functional roles in fertilization.

Lesson 2 • Egg Activation and Zygote Formation

Examines calcium waves, resumption of meiosis II, and maternal-to-zygotic transition. Connects activation events to the onset of embryonic genome control.

Lesson 3 • Sperm-Egg Interaction and Fertilization

Analyzes acrosome reaction, zona penetration, and cortical reaction preventing polyspermy. Establishes the molecular cascade that activates the egg and restores diploidy.

Lesson 1 • Blastocyst Formation and Cell Lineages

Details cavitation, trophectoderm specification, and inner cell mass segregation. Links transcription factor networks to the first two distinct cell lineages.

Lesson 2 • Early Placentation and Trophoblast Invasion

Covers syncytiotrophoblast formation, lacunar network development, and spiral artery remodeling. Establishes placental architecture as the foundation for fetal nutrition.

Lesson 3 • Cleavage Patterns and Blastomere Identity

Compares holoblastic, meroblastic, and rotational cleavage across species. Establishes how cleavage geometry influences cell fate from the earliest divisions.

Lesson 1 • Ectoderm Specification and Neural Induction

Covers BMP inhibition, neural plate induction, and surface ectoderm fate decisions. Prepares students for detailed neurulation covered in the next chapter.

Lesson 2 • Primitive Streak and Axis Formation

Describes primitive streak emergence, Hensen's node, and anterior-posterior axis establishment. Connects Wnt and Nodal signaling to the initiation of gastrulation.

Lesson 3 • Epithelial-to-Mesenchymal Transition

Examines loss of epithelial polarity, cytoskeletal remodeling, and ingression of mesoderm precursors. Links EMT molecular mechanisms to normal and pathological contexts.

Lesson 1 • Dorsal-Ventral Patterning of the Neural Tube

Examines Shh and BMP gradients establishing progenitor domains along the dorsoventral axis. Connects patterning to specific neuronal subtype generation.

Lesson 2 • Hox Genes and Anterior-Posterior Patterning

Analyzes Hox gene collinearity, homeodomain function, and regional identity along the body axis. Establishes how combinatorial Hox codes specify segment identity.

Lesson 3 • Primary and Secondary Neurulation

Compares shaping of the neural plate, neural fold elevation, and tube closure mechanisms. Identifies closure checkpoints and their failure consequences.

Lesson 4 • Neural Crest Cell Specification and Migration

Details induction at the neural plate border, EMT, and migratory streams to target tissues. Connects neural crest biology to craniofacial, cardiac, and peripheral nervous system development.

Lesson 1 • Craniofacial and Skeletal Development

Analyzes neural crest contributions to facial primordia, pharyngeal arch derivatives, and endochondral ossification. Connects patterning signals to craniofacial malformation mechanisms.

Lesson 2 • Gut Tube and Digestive Organ Formation

Details foregut, midgut, and hindgut regionalization and budding of liver, pancreas, and lung. Connects endodermal-mesodermal signaling to organ bud outgrowth.

Lesson 3 • Urogenital System Development

Covers pronephros, mesonephros, and metanephros progression and gonadal sex determination. Links SRY and hormonal signals to reproductive tract differentiation.

Lesson 4 • Limb Development and Patterning

Examines limb bud initiation, apical ectodermal ridge signaling, and three-axis patterning. Explains how digit identity and limb proportions are molecularly encoded.

Lesson 1 • Fetal Circulation and Shunts

Covers umbilical vessels, ductus venosus, foramen ovale, and ductus arteriosus function. Explains circulatory adaptations that redirect oxygenated blood to vital fetal organs.

Lesson 2 • Fetal Growth Regulation and Restriction

Analyzes IGF signaling, placental nutrient sensing, and causes of intrauterine growth restriction. Links fetal growth trajectories to long-term developmental programming outcomes.

Lesson 3 • Villous Placenta Structure and Maturation

Details primary, secondary, and tertiary villus formation and cytotrophoblast differentiation. Links villous surface area expansion to increasing fetal metabolic demands.

Lesson 1 • Prenatal Diagnosis and Counseling Principles

Surveys ultrasound, biochemical screening, and invasive diagnostic techniques for anomaly detection. Connects diagnostic findings to evidence-based counseling and management decisions.

Lesson 2 • Genetic Causes of Birth Defects

Covers chromosomal aneuploidy, single-gene disorders, and copy number variants causing anomalies. Links specific genetic lesions to recognizable malformation patterns.

Lesson 3 • Teratogens and Critical Periods

Identifies chemical, infectious, and physical teratogens and maps their effects to developmental windows. Applies dose-response and timing principles to risk assessment.

Lesson 4 • Epigenetic and Environmental Contributions

Examines how maternal nutrition, stress, and toxicant exposure alter epigenetic marks and fetal outcomes. Connects developmental origins of health and disease to embryological mechanisms.