Unlike the gradual development of some other
organ systerns, e.g., the integumentary, visual,
musculature. and acoustic-lateralis systems (see review
in O'Connell 1981), the development of the
alimentary canal from the simple, undifferentiated,
straight incipient gut of the yolk-sac larva to
the complex, segmented alimentary canal of the
adult proceeds by periodically rapid changes rather
than continuous gradation. The incipient gut remains
unchanged during yolk and oil-globule absorption
(several days or weeks),
Unlike the gradual development of some otherorgan systerns, e.g., the integumentary, visual,musculature. and acoustic-lateralis systems (see reviewin O'Connell 1981), the development of thealimentary canal from the simple, undifferentiated,straight incipient gut of the yolk-sac larva tothe complex, segmented alimentary canal of theadult proceeds by periodically rapid changes ratherthan continuous gradation. The incipient gut remainsunchanged during yolk and oil-globule absorption(several days or weeks),
การแปล กรุณารอสักครู่..