Respiratory System
The lower respiratory organs (larynx, trachea, bronchi, and lungs) begin to form during the fourth week of development. Respiratory Primordium 9 The respiratory system starts as a median outgrowth, the…
GENERAL
Fetal Period: Ninth Week to Birth
The transformation of an embryo to a fetus is gradual, but the name change is meaningful because it signifies that the primordia of all major systems have formed. Development during…
Fourth to Eighth Weeks of Human Development
All major external and internal structures are established during the fourth to eighth weeks. By the end of this embryonic period, the main organ systems have started to develop. As…
Third Week of Human Development
Rapid development of the embryo from the trilaminar embryonic disc during the third week (see Fig. 4.3 H ) is characterized by: • Appearance of primitive streak • Development of…
Second Week of Human Development
As implantation of the blastocyst occurs, morphologic changes in the embryoblast produce a bilaminar embryonic disc composed of epiblast and hypoblast ( Fig. 3.1 A ). The embryonic disc gives…
First Week of Human Development
Human development begins at fertilization when a sperm fuses with an oocyte to form a single cell, the zygote . This highly specialized, totipotent cell (capable of giving rise to…
Introduction to Human Development
Human development is a continuous process that begins when an oocyte (ovum) from a female is fertilized by a sperm (spermatozoon) from a male to form a single-celled zygote (…
Laparoscopic and Robotic-Assisted Total and Supracervical Hysterectomy
Video Clips on DVD 10-1 Conventional Total Laparoscopic Hysterectomy A: Sealing and Transection of Left Infundibulopelvic Ligament B: Development of Bladder Flap C: Uterine Vessel Ligation D: Colpotomy 10-2 Robotic-Assisted…
Alternative Treatments to Hysterectomy
Video Clip on DVD 12-1 Operative Hysteroscopic Myomectomy Despite increasing medical and surgical options, the number of hysterectomies in the past decade has not decreased. Hysterectomy remains the second most…
Difficult Vaginal Hysterectomy
Video Clips on DVD 8-1 Uterine Morcellation Techniques 8-2 Difficult Anterior Entry 8-3 Difficult Posterior Entry 8-4 Uterovaginal Prolapse Previous chapters have discussed the advantages of vaginal hysterectomy over other…
