An area or expanse. / (anatomy) A series of connected body organs, such as the digestive tract. / A small booklet such as a pamphlet, often for promotional or informational uses.

(obsolete) To pursue, follow; to track. / (obsolete) To draw out; to protract.

present participle of tract

simple past tense and past participle of tract

plural of tract

(anatomy) The digestive tract.

System of organs within multicellular animals which takes in food, digests it to extract energy and nutrients, and expels the remaining waste.

(anatomy) The gastrointestinal tract.

(anatomy) the continuous system involved in the production and excretion of urine; the kidneys, ureters, urinary bladder and urethra

(anatomy) The passages, divided into an upper and a lower part, through which air enters and leaves the body, including the mouth, nose and nasal passages, pharynx, larynx, trachea, bronchi and conducting bronchioles, sometimes further including the respiratory bronchioles, alveolar ducts and alveoli.