Dictionary » B » Bilateral



(Science: anatomy) Having two sides or pertaining to both sides.

Origin: L. Latus = side

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Human Pathology 'Multiple-Choice Questions'

... found on day 10 of the menstrual cycle. c. be at moderate levels comparable to those found on day 7 of the menstrual cycle. d. be negligible. 10. Bilateral ovariectomy (removal of both ovaries) of a 30 year-old pregnant woman on the 60th day of gestation would cause: a. an increase in plasma estrogen ...

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by ScrimmSphere
Mon Feb 04, 2013 11:03 am
Forum: Human Biology
Topic: Human Pathology 'Multiple-Choice Questions'
Replies: 1
Views: 6960

Please check my work?

... common characteristics of echinoderms? A tube feet, circulatory system, body symmetry B marine-dwellers, endoskeletons, water-vascular system C bilateral symmetry, ossicles, respiratory system D mouths, protosomes, body symmetry is it C? ------ Which of the following is NOT a characteristic ...

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by radicali
Thu Jun 14, 2012 8:57 pm
Forum: General Discussion
Topic: Please check my work?
Replies: 1
Views: 3602

Evolution of the Face and Head

The generally-accepted connection is not with feeding, but with symmetry and movement - bilateral animals, with propulsion driven equally from 2 sides, wind up with a directionality and a front end. Packing sense receptors and processors there, to deal with first-contact ...

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by Darby
Thu May 10, 2012 2:15 pm
Forum: Evolution
Topic: Evolution of the Face and Head
Replies: 5
Views: 5356

Re: what is the difference between neoteny and post development

... in its life cycle. So maybe neoteny occurs when reproduction is capable at a younger stage in the life cycle? Seems like this may be aimed at how bilateral echinoderm larvae hypothetically gave rise to bilateral vertebrates.

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by awkko808
Thu Dec 08, 2011 11:00 pm
Forum: Evolution
Topic: what is the difference between neoteny and post development
Replies: 1
Views: 1651

Question About The Development of Unidirectional Movement

... My professor stressed that the three morphological developments associated with the evolution of unidirectional movement were cephalization, bilateral symmetry and triploblasty (i.e. the development of the mesoderm). I am pretty comfortable explaining how cephalization is associated with ...

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by cherib
Mon Oct 05, 2009 6:36 pm
Forum: Zoology Discussion
Topic: Question About The Development of Unidirectional Movement
Replies: 1
Views: 3033
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