Embryologic Derivatives | Introduction | Germ Layers | Human Embryology for Students скачать в хорошем качестве

Embryologic Derivatives | Introduction | Germ Layers | Human Embryology for Students

This embryology lecture on embryologic derivative will explain the formation of the three germ layer derivatives. Embryologic derivatives have been made simple using fun mnemonics, so they are easier to recall during medical embryology board exam. So, grab your beverage of choice and watch this sqadia.com lecture for a complete understanding of how ectoderm derivatives, mesoderm derivatives and endoderm derivatives are made! ▬ 📌 Germ Layers and their Derivatives The embryonic period or period of organogenesis occurs from the third to the eighth weeks of development after gastrulation. Starting of, the three germ layers are: 🔵 Ectoderm 🔵 Mesoderm 🔵 Endoderm ▬ 📌 What is Ectoderm? During Neurulation the Ectoderm divides into two parts: ✔️Surface Ectoderm ✔️Neuroectoderm The animations in this medical embryology lecture, beautifully illustrates how the Notochordal process takes place from a Primitive Streak formed from the Primitive Node. Notochord plate is made from which the Notochord emerges. The process by which the Neural Plate is formed by the thickening of the Ectoderm. The stages of Neural Tube formation from the Neural Plate is shown by visuals. ▬ 📌 Derivatives of the Ectoderm include … Embryologic derivatives of the ectoderm include three parts: 🟢 Surface Ectoderm 🟢 Neural Tube 🟢 Neural Crest Surface Ectoderm Derivatives include epidermis, Adenohypophysis, Lens, Epithelial linings of the oral cavity, Sensory organs of the ear, Olfactory epithelium, Anal canal below the pectinate line, Parotid gland, Sweat glands, and Mammary Glands. And a great fun mnemonic is included to remember them easily! Neural Tube Derivatives include: Neurohypophysis, CNS neurons, Oligodendrocytes, Astrocytes, Ependymal cells, and Pineal gland. Remember Neural Tube derivatives with our very own mnemonic. Neural Crest derivatives include: Enterochromaffin cells, Leptomeninges, Melanocytes, Odontoblasts, Peripheral Nervous System (PNS), Adrenal medulla, Schwann cells, Spiral membrane, Endocardial cushions, and Skull bones. Accompanied by a funny phrase to recall the Embryologic Derivatives of the Ectodermal germ layer easily. ▬ 📌 Derivatives of the Mesoderm include … Mesoderm is the middle layer of the three germ layers. The derivatives of the mesoderm are listed and a simplified method to remember them by is added. Mesodermal defects are also included in this lecture which are commonly referred to as the VACTERL associations: 🟠 Vertebral defects 🟠 Anal atresia 🟠 Cardiac defects 🟠 Tracheo-esophageal fistula 🟠 Renal anomalies 🟠 Limb abnormalities ▬ 📌 Derivatives of the Endoderm include ... The third and final germ layer where the derivatives of endoderm include: ✔️Anal canal above the pectinate line ✔️Urethra ✔️Vagina ✔️Lungs ✔️Liver ✔️Gallbladder ✔️Pancreas ✔️Eustachian tube ✔️Thymus ✔️Parathyroid gland ✔️Thyroid follicular cells ✔️Parafollicular or C cells The best way to remember the endoderm derivatives is the rule that all of them are related to the gastrointestinal system and all the viscera of the body except for those mentioned in the Mesoderm. ▬ 🎬 5500+ sqadia.com Medical Videos ▬▬▬▬▬▬▬▬▬▬ 👩🏻‍⚕️ Accessible Medical Student Education 24/7/365 💡 Simplifying Medical Learning 💪 Study Hard, Dream Big, Achieve More