Trachean

Trachean is a term that can refer to several different concepts, primarily within the realm of biology. One common meaning relates to the tracheal system, a network of air-filled tubes that deliver oxygen directly to the tissues of many arthropods, including insects, myriapods, and arachnids. This system is distinct from the circulatory system found in vertebrates, which transports oxygen via blood. The trachean system consists of external openings called spiracles, through which air enters, and a branching network of tracheae, tracheoles, and air sacs that extend throughout the body.

In a broader biological context, "trachean" can also describe anything related to the trachea, also known as the windpipe. The trachea is a cartilaginous tube that connects the larynx to the bronchi of the lungs, allowing the passage of air. Conditions or anatomical features associated with this organ might be described as trachean. For instance, a trachean obstruction would refer to a blockage in the windpipe. The exact context in which "trachean" is used is crucial for understanding its specific meaning.