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Body Cavities & Serosal Membranes

Official Ninja Nerd Website: https://ninjanerd.org You can find the NOTES and ILLUSTRATIONS for this lecture on our website at: https://www.ninjanerd.org/lecture/bod... Ninja Nerds! In this anatomy and physiology lecture, Professor Zach Murphy presents a clear and organized overview of Body Cavities and Serosal Membranes, laying the groundwork for understanding how the human body is compartmentalized and protected. We begin by exploring the two major body divisions: the dorsal cavity, which includes the cranial and vertebral cavities, and the ventral cavity, which houses the thoracic, abdominal, and pelvic cavities. You’ll learn how these spaces support and protect internal organs while allowing for movement and expansion. The lecture then dives into serous membranes (serosae)—thin, double-layered membranes that line the ventral cavities and surround many internal organs. We explain the structure and function of the parietal and visceral layers, the role of serous fluid, and how these membranes reduce friction in areas like the lungs (pleura), heart (pericardium), and abdominal organs (peritoneum). This lecture gives you a solid anatomical framework for locating and describing internal structures, essential for any future study in medicine or healthcare. Enjoy the lecture and support us below! Table of Contents: 0:00 Lab 0:07 Body Cavities + Serosal Membranes Introduction 1:30 Dorsal Body Cavity 2:52 Ventral Body Cavity: Thoracic 11:57 Ventral Body Cavity: Abdominopelvic 17:44 Abdominopelvic Cavity: The 4 Quadrants 19:21 Abdominopelvic Cavity: The 9 Quadrants 23:56 Comment, Like, SUBSCRIBE! 🌐 Official Links Website: https://www.ninjanerd.org Podcast: https://podcast.ninjanerd.org Store: https://merch.ninjanerd.org 📱 Social Media   / ninjanerdlectures     / ninjanerdlectures     / ninjanerdlectures   https://x.com/ninjanerdsci/   / ninja-nerd   💬 Join Our Community Discord:   / discord   #ninjanerd #bodycavity #membrane