GLOSSARY 421 



Imbibi'tion : a form of diffusion that results in the sweUing of material taking 



in a fluid. 

 Immu'nity (Lat. immunis, free from duty) : the successful resistance of an 



organism to infections from microorganisms. 

 Imperfect flowers : flowers having only one kind of essential organs, either 



stamens or pistils. 

 Incubation period : the time after the germs of a disease enter the body untU 



the symptoms of the disease appear. 

 Infec'tious : caused by disease-producing organisms, or germs. 

 Inher'itance : that which is passed on by heredity. 

 In'stinct : a tendency to perform an act which is performed for the first time 



without being learned. 

 In'sulin: a hormone produced in " Islands of Langerhans " in the pancreas; 



remedy for diabetes. 

 Intes'tine (Lat. intestinus, internal) : the food tube in vertebrates from the 



pyloric end of the stomach to the anus. It is divided into the small and 



the large intestine. 

 ^'ris (Gr. iris, rainbow) : the colored portion of the eye, having the pupil in the 



center. 



Kid'neys : glands which secrete urine. 



fijuiet'ic (Gr. kinein, to move) : energy employed in producing motion. 



Lac'teals (Lat. lacteus, milky) : lymphatic vessels which carry fats and other 



substances from the intestine to the thoracic duct. 

 Lar'va (Lat. larva, a ghost) : a young stage in the development of some forms 



of animals, which becomes self-sustaining but which does not have the 



characteristics of the adult. 

 La'tent (Lat. latere, to lie hid) : lying dormant but capable of development. 

 Leg'umes (Lat. legere, to gather) : plants which bear seeds in pods — peas, 



beans, and the like ; also the fruits or seeds of such plants. 

 Len'ticel : a breathing hole in the bark of a tree. 

 Lig'ament (Lat. ligare, to bind) : a band of connective tissue binding one bone 



to another. 

 Liv'er : a digestive gland which secretes bile. 

 Lymph (Lat. lympha, water) : plasma and colorless corpuscles outside of the 



blood vessels. 

 Ly'sins (Gr. lysis, a loosing) : antibodies which have power to dissolve bacteria 



in the blood. 



H. NEW CIV. BIOL. — 28 



