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altricial |
Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson | 0.18 sec. |
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altricial said of birds which are hatched with their eyes closed. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| ? Mentioned in | ? References in periodicals archive | |
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| Humans are highly altricial, with singleton
births being the norm. In all altricial birds,
hatchlings come out with poorly formed pelvic bones that are still
composed largely of cartilage. The latter point is particularly
important: the rat and mouse are altricial species, so brain development
at birth corresponds to fetal stages of human development (Rodier 1988),
and thus the concentrations or temporal factors for nicotine or ETS may
not reflect those experienced in typical human exposure scenarios. |
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