Last Minute Lecture

Animal Embryonic Development Explained — Fertilization, Cleavage, Gastrulation, and Organogenesis | Chapter 47 of Campbell Biology From a single cell to a complex organism—animal embryonic development is a marvel of biology, involving precise cellular coordination and pattern formation. Chapter 47 of Campbell Biology explores the essential stages that transform a fertilized egg into a multicellular animal, including cleavage, gastrulation, neurulation, and organogenesis. This chapter explains how germ layers form, cells differentiate, and organs emerge through intricate molecular signals and morphogenetic movements. Watch the podcast summary below for a visual breakdown, then read on for a deeper dive into the processes and key terms that define animal development from zygote to embryo and beyond. Introduction: Fertilization—The Start of Development Embryonic development begins with fertilization , the union of sperm and egg to create a zygote . The acrosome on the sper...