In biology, a rachis (from the Ancient Greek: ῥάχις [rhákhis], "backbone, spine") is a main axis or "shaft". == In zoology and microbiology == In vertebrates, rachis can refer to the series of articulated vertebrae, which encase the spinal cord.
In biology, a rachis (from the Ancient Greek: ῥάχις [rhákhis], "backbone, spine") is a main axis or "shaft". == In zoology and microbiology == In vertebrates, rachis can refer to the series of articulated vertebrae, which encase the spinal cord.
Source: Wikipedia "Rachis" · CC BY-SA 4.0
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