...1.INTRODUCTION Collective bargaining has been defined by different experts in different ways. Nevertheless, it is treated as a method by which problem of wages and conditions of employment are resolved peacefully and voluntarily between labor and management. However, the term collective bargaining is opposed to individual bargaining.
Definition of EMBRYO SAC. : the female gametophyte of a seed plant consisting of a thin-walled sac within the nucellus that contains the egg nucleus and other nuclei which give rise to endosperm on fertilization.See embryo sac defined for kids.ADVERTISEMENT. the female gametophyte of a seed plant consisting of a thin-walled sac within the nucellus that contains the egg nucleus and other nuclei which give rise to endosperm on fertilization. See embryo sac defined for kids. ADVERTISEMENT.
The yolk sac is the first anatomical structure identified within the gestational sac.It plays a critical role in embryonal development by providing nutrients, serving as the site of initial haematopoiesis, and contributing to the development of fetal gastrointestinal and reproductive systems 2. yolk sac appears as a circular anechoic structure within gestational sac, but outside the amniotic membrane. 2  yolk sac should be seen when the mean sac diameter (MSD) is 20 mm on transabdominal scanning and is usually seen endovaginally with an MSD of 8-10 mm.