Fetal development begins with the fertilization of an egg by a sperm to form a zygote. The zygote undergoes cleavage and gastro development until an embryo forms. After week nine, the embryo becomes a fetus, which continues development and is born after nine months. This lecture covers what happens each day of development from day 1 - 8 as well as how ultrasounds work and possible problems with delivery. Following implantation, a placenta and umbilical cord form. Around 4 weeks, the forebrain, eye, and heart begin to develop, as well as arm and leg buds. By week 12, the heart has begun to beat and the brain is functioning. Labor ideally occurs around 40 weeks. The cervix dilates, opening wide enough for the baby to enter the birth canal and be delivered.
Q: In the lesson you mentioned that people with Down syndrome can live normal lives, but I know a 40-year-old person in my neighborhood with Down syndrome who still lives/depends on his parents. What did you mean?
A: What I meant is that though Down syndrome presents a lot of mental difficulties and developmental problems, the severity and level of adversity is variable. Decades ago, doctors would commonly tell pregnant women with a Down syndrome fetus that their child would not be able to do anything on its own and they would use the term “retarded” to describe him or her. These days you can find some people with Down syndrome employed, getting driver’s licenses, and other independent adult activities. Yes, it typically takes a lot longer for someone with Down syndrome to learn a new skill, but they have the potential to do a lot.
Embryological & Fetal Development
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.
This book is the ninth edition of the top-selling Human Anatomy & Physiology text and the authors have produced the most accessible, comprehensive, up-to-date and visually stunning anatomy & physiology textbook on the market.. It presents information in smaller and more digestible bites, making it easier to read and navigate.
This book has a superb balance between structure and function and continue to emphasize the correlations between normal physiology and pathophysiology, normal anatomy and pathology, and homeostasis and homeostatic imbalances. The acclaimed illustration program continues to be refined and is unsurpassed in the market. The thirteenth edition is fully integrated with a host of innovative electronic media, including WileyPlus 5.0 (access purchased separately.) No other text and package offers a teaching and learning environment as rich and complete.
This book includes updated examples, references, and dozens of illustrations. Readers of the new edition will come to understand the meanings of terms in anatomy and physiology, get to know the body's anatomical structures, and gain insight into how the structures and systems function in sickness and health. It also features updated information on how systems function in illness and in health.