Encyclopedia of Biology

(17 feet) in height and is native from Quebec to
British Columbia in Canada and southward to Flori-
da, Arkansas, and California in the United States.

Due to the fact that ragweeds are annuals, they can

be eradicated simply by mowing them before they

release their pollen in late summer.

78 Compositae

mouth

tongue

salivary gland

trachea

right bronchus

diaphragm

gall bladder

bile duct

duodenum

ileum

cecum

appendix

epiglottis

larynx

esophagus

left lung

liver

stomach

pancreas

colon

rectum

anus

pancreatic duct

The complete digestive tract is one where food is ingested at one end of the tract, the mouth, and wastes from digestion are passed out
of the tract at the other end, the anus.