According to Wulfert [60] the primitive germ-cells of Gonothyraea can be distinguished soon after the fixation of the planula, appearing amongst the interstitial cells of the ectoderm.
The apical senseorgan is used for temporary attachment to the maternal vestibule in which development takes place, but permanent fixation is effected by the oral surface.
The tissues and fluids are treated by various histological methods, but, to speak generally, examination is made either in films smeared on thin cover-glasses and allowed to dry, or in thin sections cut by the microtome after suitable fixation and hardening of the tissue.
fixation הגייה עם משמעויות, מילים נרדפות, הפכים, תרגומים, משפטים ועוד