Gastrulation 2
Share your inquiries now with community members
Click Here
Sign up Now
Lessons List | 52
Lesson
Show More
Lessons
Comments
Related Courses in Medical
Course Description
embryology, the study of the formation and development of an embryo and fetus. Before widespread use of the microscope and the advent of cellular biology in the 19th century, embryology was based on descriptive and comparative studies. From the time of the Greek philosopher Aristotle it was debated whether the embryo was a preformed, miniature individual (a homunculus) or an undifferentiated form that gradually became specialized. Supporters of the latter theory included Aristotle; the English physician William Harvey, who labeled the theory epigenesis; the German physician Caspar Friedrick Wolff; and the Prussian-Estonian scientist Karl Ernst, Ritter von Baer, who proved epigenesis with his discovery of the mammalian ovum (egg) in 1827. Other pioneers were the French scientists Pierre Belon and Marie-François-Xavier Bichat.
Baer, who helped popularize Christian Heinrich Pander’s 1817 discovery of primary germ layers, laid the foundations of modern comparative embryology in his landmark two-volume work Über Entwickelungsgeschichte der Thiere (1828–37; “On the Development of Animals”). Another formative publication was A Treatise on Comparative Embryology (1880–91) by the British zoologist Frances Maitland Balfour. Further research on embryonic development was conducted by the German anatomists Martin H. Rathke and Wilhelm Roux and also by the American scientist Thomas Hunt Morgan. Roux, noted for his pioneering studies on frog eggs (beginning in 1885), became the founder of experimental embryology. The principle of embryonic induction was studied by the German embryologists Hans Adolf Eduard Driesch, who furthered Roux’s research on frog eggs in the 1890s, and Hans Spemann, who was awarded a Nobel Prize in 1935. Ross G. Harrison was an American biologist noted for his work on tissue culture.
Trends
WiFi hacking
Digital Electronics basics
C Programming Language
MS Excel
Excel Course Basic to Advanced
Adobe illustrator tools for designers
Ethical Hacking
Learning English Speaking
Mobile Apps from Scratch
Human Resource Management
Python programming language
Complete WIFI Hacking Course Beginner to Advanced
Excel Power Query in excel for beginners
Photography
Digital Marketing
COMPLETE TOEFL COURSE
Software Development
AI Writing tools in google docs for beginners
Generative AI Tutorial For Beginners
Downloading and installing tux paint for kids
Recent
Rock sitting dance workout for beginners
Fat Burning home workout For beginners
Home weight loss workout For women
Cardio Kickboxing HIIT for beginners
HIIT cardio walking workout at home
Gospel cardio dance workout at home
Upper body cardio weights for beginners
Legs workout with dumbbell for beginners
Cardio workout for beginners
Hotel HIIT legs workout for beginners
Cool down stretch workouts at home
Cardio boxing workout at gym
Legs and abs workout at home
Cardio Kickboxing workouts at gym
Pilates and barre inspired workouts at gym
Intense cardio HIIT workouts at gym
Knockout cardio workouts for beginners
Tucked abs workout at home
Hamstrings tempo workout at home
Dumbbell cardio HIIT workouts at gym