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01:21Tooth Anatomy
The human tooth enables us to eat a variety of foods, speak clearly, and even aid in shaping our faces. Teeth are composed of various elements that work together. Here's a detailed look at the anatomy of a human tooth.
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Related Experiment Video
Updated: Jul 17, 2026
09:26
Quantification of Orofacial Phenotypes in Xenopus
Published on: November 6, 2014
Isovaleric acid accumulation in odontocete melon during development.
1Northwest Fisheries Science Center, National Marine Fisheries Services, National Oceanographic and Atmospheric Administration, Seattle, Washington, USA. sgardner@cibnor.mx
Die Naturwissenschaften
|November 12, 2003
Summary
Cetacean biosonar relies on specialized lipids in the acoustical window. Research shows isovaleroyl lipids increase with size in young porpoises and dolphins, indicating the acoustic system develops after birth.
Area of Science:
- Marine Biology
- Biochemistry
- Bioacoustics
Background:
- Odontocete biosonar is crucial for environmental perception.
- The acoustical window (melon and mandibular tissues) contains unique lipids, including isovaleric acid.
- The developmental origin of these acoustical lipids remains largely unexplored.
Purpose of the Study:
- To investigate the developmental trajectory of the cetacean acoustical region.
- To characterize the accumulation of isovaleroyl lipids during early life stages.
Main Methods:
- Biochemical analysis of melon tissues from Phocoena phocoena (porpoise) and Tursiops truncatus (dolphin) of varying sizes.
- Using body size as a proxy for age to track lipid development.
Main Results:
- A significant positive correlation was observed between body length and the proportion of isovalerate in melon tissues.
- Isovalerate levels increase substantially as individuals grow.
Conclusions:
- The cetacean acoustic system, particularly its biochemical lipid composition, is not fully developed at birth.
- Significant biochemical changes occur in the acoustical window lipids throughout postnatal development.