Zonary Placenta
What is a Zonary Placenta? Definition and Structure The zonary placenta forms a band-like structure encircling the chorion, which is the outermost membrane surrounding the…
Author: Wise IAS
Discoid Placenta
Introduction to Discoid Placenta The discoid placenta is a fascinating structure found in primates, including humans, and certain rodents. This unique type of placenta plays…
Organogenesis
What is Organogenesis? Organogenesis refers to the phase in embryonic development when cells differentiate to form organs. This process follows gastrulation, where the three germ…
The Endoderm
Introduction to the Endoderm The endoderm is one of the three primary germ layers in early embryonic development. It is crucial for forming many internal…
Special Features of Aves
The Amniotic Egg: A Key Adaptation What is an Amniotic Egg? The amniotic egg is a crucial adaptation for birds. It allows avian embryos to…
Fertilization in Birds
Introduction to Bird Fertilization Fertilization is a crucial step in the reproductive cycle of all animals, including birds. Unlike many mammals, birds exhibit unique reproductive…
Blastodisc in Embryonic Development
Introduction The blastodisc is a crucial structure in the early stages of embryonic development for many species, particularly in birds and reptiles. This article delves…
Neural tube formation
What is the Neural Tube? The neural tube is a hollow structure that forms early in embryonic development. It eventually develops into the brain and…
Limb Development in Avian Embryos
Introduction to Limb Development Limb development in avian species, particularly in chickens, serves as a model for understanding vertebrate limb formation. The process begins with…
Extraembryonic Membranes in Bird
Understanding Extraembryonic Membranes Extraembryonic membranes are specialized structures that form outside the embryo during development. They provide essential support, including nutrition, waste management, and protection.…