Rachis
Rachis is a term used in various fields of biology to refer to a main axis or "backbone" of some kind. In botany, it refers to the main stem of an inflorescence or a compound leaf. In zoology, it refers to the long central shaft of a feather. In human anatomy, it is another name for the spinal column.
Botany[edit | edit source]
In botany, the rachis is the main axis of a compound leaf or an inflorescence. In the case of a compound leaf, the rachis replaces the petiole. The leaflets of the compound leaf are attached to the rachis. In an inflorescence, the rachis is the stem bearing the floral parts. The length of the rachis can be one of the factors influencing the shape of the inflorescence.
Zoology[edit | edit source]
In zoology, the rachis is the long central shaft of a feather. It bears the barbs of the feather, which in turn bear the barbules. The rachis is strong and lightweight, and its shape and rigidity contribute to the feather's overall function in flight or insulation.
Human anatomy[edit | edit source]
In human anatomy, rachis is another name for the spinal column. The term is not commonly used in this context, but can be found in older or more technical sources.
See also[edit | edit source]
| Rachis Resources | |
|---|---|
|
 |
Search WikiMD
Ad.Tired of being Overweight? Try W8MD's physician weight loss program.
Semaglutide (Ozempic / Wegovy and Tirzepatide (Mounjaro / Zepbound) available.
Advertise on WikiMD
|
WikiMD's Wellness Encyclopedia |
| Let Food Be Thy Medicine Medicine Thy Food - Hippocrates |
Translate this page: - East Asian
中文,
日本,
한국어,
South Asian
हिन्दी,
தமிழ்,
తెలుగు,
Urdu,
ಕನ್ನಡ,
Southeast Asian
Indonesian,
Vietnamese,
Thai,
မြန်မာဘာသာ,
বাংলা
European
español,
Deutsch,
français,
Greek,
português do Brasil,
polski,
română,
русский,
Nederlands,
norsk,
svenska,
suomi,
Italian
Middle Eastern & African
عربى,
Turkish,
Persian,
Hebrew,
Afrikaans,
isiZulu,
Kiswahili,
Other
Bulgarian,
Hungarian,
Czech,
Swedish,
മലയാളം,
मराठी,
ਪੰਜਾਬੀ,
ગુજરાતી,
Portuguese,
Ukrainian
Medical Disclaimer: WikiMD is not a substitute for professional medical advice. The information on WikiMD is provided as an information resource only, may be incorrect, outdated or misleading, and is not to be used or relied on for any diagnostic or treatment purposes. Please consult your health care provider before making any healthcare decisions or for guidance about a specific medical condition. WikiMD expressly disclaims responsibility, and shall have no liability, for any damages, loss, injury, or liability whatsoever suffered as a result of your reliance on the information contained in this site. By visiting this site you agree to the foregoing terms and conditions, which may from time to time be changed or supplemented by WikiMD. If you do not agree to the foregoing terms and conditions, you should not enter or use this site. See full disclaimer.
Credits:Most images are courtesy of Wikimedia commons, and templates Wikipedia, licensed under CC BY SA or similar.
Contributors: Prab R. Tumpati, MD
