
Chapter 4: Embryology (Part 1)
03/25/20 • 41 min
In the first part of the Embryology chapter from Crush Step 1, we review topics such as:
- Description of Anatomy
- Early Embryology: The First Month
- From Fertilization to Implantation
- The Rule of Twos
- Gastrulation and the Ectoderm, Endoderm, and Mesoderm
- Neural Tube Closure and Beginning of Organogenesis
- Week Five and Beyond
- Organogenesis and Teratogenicity
- The “Fetal Period” of Organ Maturation
- Fetal Circulation and Erythropoiesis
- Structure of the Placenta and Umbilical Cord
- Changes to Fetal Circulation at Birth
- Fetal Erythropoiesis
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In the first part of the Embryology chapter from Crush Step 1, we review topics such as:
- Description of Anatomy
- Early Embryology: The First Month
- From Fertilization to Implantation
- The Rule of Twos
- Gastrulation and the Ectoderm, Endoderm, and Mesoderm
- Neural Tube Closure and Beginning of Organogenesis
- Week Five and Beyond
- Organogenesis and Teratogenicity
- The “Fetal Period” of Organ Maturation
- Fetal Circulation and Erythropoiesis
- Structure of the Placenta and Umbilical Cord
- Changes to Fetal Circulation at Birth
- Fetal Erythropoiesis
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Previous Episode

Chapter 3: Dermatology
In this episode we cover the Dermatology chapter of Crush Step 1 including topics such as:
- Histology and Physiology
- Describing Lesions
- Pathology
- Common Dermatology Conditions
- Autoimmune Diseases
- Conditions of Pigmentation
- Neoplasms, Dysplasias, and Malignancies
- Skin Infections and Infestations
- Dermatologic Manifestations of Internal Disease
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Next Episode

Chapter 4: Embryology (Part 2)
In the second and final part of the Embryology chapter, we review the following topics:
Cardiac Embryology
Formation of the Cardiac Loop
Septation of the Heart
Vascular Embryology- Neuroembryology
Gastrointestinal Embryology
Renal Embryology
Reproductive Embryology
Head and Neck Embryology
Growth and Development
Neonatal Medicine
Developmental Milestones
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