Sourav Bio 
What is Embryonic Induction? Historical Background of Embryonic Induction Advertisements The historical background of embryonic induction is marked by the pioneering work of Hans Spemann, a German embryologist, and his student Hilde Mangold in the 1920s. Their extensive research on newt species, specifically Triturus cristatus and Triturus taeniatus, led to the discovery of neural induction. … Read more
What is Fate Map? Advertisements A fate map is a diagram or representation of an egg or blastula that depicts the expected fate or destiny of each cell or region at a later stage of development. Fate maps are indispensable tools in embryological experiments as they provide researchers with valuable information about the normal developmental … Read more
Advertisements The development of a chick embryo from a freshly laid hen’s egg involves various stages and intricate processes. Let’s explore the initial stages of chick embryo development based on the provided information: The hen’s egg, when laid, is relatively large, measuring about 3cm in diameter and 5cm in length. It is considered a macrolecithal … Read more
Special features of the gametes for fertilization Advertisements Both gametes, the sperm and the egg, possess special features that enable successful fertilization. Egg: Sperm: Advertisements In summary, the egg and the sperm possess specialized features that are essential for fertilization. The egg has protective coverings, recognition mechanisms, and cortical granules to prevent polyspermy and ensure … Read more
What is cleavage? Characteristics of cleavage Advertisements Cleavage exhibits several distinct characteristics during the early stages of embryo development: Overall, cleavage is characterized by the rapid division of the fertilized egg, resulting in the generation of numerous blastomeres. These divisions lead to the formation of either a solid mass of cells (morula) or a hollow … Read more
Advertisements Eggs are fascinating structures found in various organisms across the animal kingdom. They serve as the starting point for new life, harboring the potential for development and growth. However, not all eggs are created equal. Different species exhibit diverse types of eggs, varying in size, shape, and the presence of yolk. Moreover, eggs are … Read more
What is Developmental Biology? Advertisements Developmental biology is a branch of biology that studies the processes and mechanisms by which multicellular organisms grow, develop, and reach their final form from a single fertilized egg or embryo. It examines how cells differentiate and specialize to form different tissues and organs, as well as how these structures … Read more
What is Developmental Biology? Advertisements Developmental biology is a scientific discipline that focuses on understanding how organisms grow, develop, and mature from a fertilized egg into a complex multicellular organism. It explores the processes, mechanisms, and patterns that shape the formation of tissues, organs, and the overall body plan throughout an organism’s life cycle. Developmental … Read more
What is Sensory Receptor? Definition of Sensory Receptor Advertisements A sensory receptor is a structure or specialized cell that detects and responds to physical stimuli in the environment, both internally and externally. It converts these stimuli into electrical signals that are transmitted to the central nervous system for processing and perception. How Sensory Systems Work? … Read more
What is Cranial nerve? Definition of Cranial nerve Advertisements Cranial nerves are a set of twelve pairs of nerves that emerge directly from the brain and are responsible for controlling various functions in the head, neck, and some organs in the chest and abdomen. These nerves transmit sensory information, such as sight, hearing, taste, and … Read more
What is Spinal cord? Definition of Spinal cord Advertisements The spinal cord is a long, tubular structure made of nervous tissue that extends from the brainstem to the lower back. It is a vital part of the central nervous system, responsible for transmitting nerve signals between the brain and the rest of the body. It … Read more
What is Human Brain? Definition of Brain Advertisements The brain is the central organ of the human nervous system, responsible for processing information, controlling bodily functions, and facilitating cognition, emotions, and behaviors. Characterisitcs Features of Human Brain The human brain possesses several characteristic features that contribute to its complexity and functionality. Here are some key … Read more
What is Autonomic nervous system? Definition of Autonomic nervous system Advertisements The autonomic nervous system (ANS) is a division of the nervous system responsible for regulating involuntary bodily functions such as heart rate, digestion, respiration, and sexual arousal. It consists of the sympathetic, parasympathetic, and enteric divisions, which work together to maintain homeostasis and respond … Read more
What is Urinary System? Definition of Urinary System Advertisements The urinary system is a collection of organs, including the kidneys, ureters, bladder, and urethra, that work together to eliminate waste from the body, regulate fluid balance, and maintain the chemical stability of the body. Anatomy of the Urinary System Two kidneys, two ureters, a urinary … Read more
Advertisements The circulatory system is a vital component of vertebrates, consisting of two interconnected systems: the blood vascular system and the lymphatic system. While both systems play crucial roles in maintaining the body’s overall function, the circulatory system primarily refers to the blood vascular system. In vertebrates, the blood vascular system is a closed system … Read more
What is Human Respiratory System? Advertisements The human respiratory system is a complex network of organs and tissues responsible for the process of respiration, which involves the intake of oxygen and the removal of carbon dioxide from the body. It allows for the exchange of gases between the external environment and the bloodstream. The major … Read more
What is Respiratory System? Advertisements The respiratory system is a complex network of organs and tissues in living organisms that is responsible for the exchange of gases, primarily oxygen and carbon dioxide, between the organism and its environment. It plays a crucial role in facilitating the intake of oxygen required for cellular respiration and eliminating … Read more
What is Visceral Arches? Evolution of Visceral Arches Cyclostomes Elasmobranchs Bony fishes Amphibia Reptiles Birds Mammals Advertisements Mammals, a diverse group of warm-blooded vertebrates, exhibit specific modifications in their skull, ear ossicles, and laryngeal structures that are distinct from other vertebrate groups. In mammals, the pterygoquadrate bone breaks into two parts: the alisphenoid, which becomes … Read more
Advertisements Jaw suspension in vertebrates refers to the way the lower jaw is attached to the upper jaw or the skull, enabling efficient biting and chewing. This attachment is achieved through modifications in the visceral arches, which are part of the splanchnocranium in the vertebrate skull. The vertebrate skull is composed of three major parts: … Read more
What is Skeletal system? Definition of Skeletal system Advertisements The skeletal system is the framework of bones, joints, and cartilages that provides support, protection, and facilitates movement in the human body. Types of Skeletal Systems There are three main types of skeletal systems found in different organisms: hydrostatic skeleton, exoskeleton, and endoskeleton. Each type of … Read more
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