The trachea is a mobile cartilaginous and membranous tube. It begins in the neck as a continuation of the larynx at the lower border of the cricoid cartilage at the level of the 6th cervical vertebra. It descends in the midline of the neck.

In the thorax, the trachea ends below at the carina by dividing into right and left principal bronchi at the level of the sternal angle (opposite the disc between the 4th and 5th thoracic vertebrae). During expiration, the bifurcation rises by about one vertebral level, and during deep inspiration may be lowered as far as the 6th thoracic vertebra.

Webster Dictionary Meaning

1. Trachea
- The windpipe. See Illust. of Lung.
- One of the respiratory tubes of insects and arachnids.
- One of the large cells in woody tissue which have spiral, annular, or other markings, and are connected longitudinally so as to form continuous ducts.
Share it:  Cite

More from this Section

  • Homeless, Chronic
    Homeless, Chronic is the chronically homeless individuals have a disability and have been ...
  • Serious Mental Illness
    Serious Mental Illness is a diagnosable mental disorder found in individuals aged 18 years ...
  • Ultrasound
    Ultrasound is a very high frequency sound wave (not electromagnetic radiation) generated ...
  • Meninges
    The meninges are three connective tissue coverings that surround, protect, and suspend ...
  • Vertebral canal
    The spinal cord lies within a bony canal formed by adjacent vertebrae and soft tissue ...