208 



INDEX 



Hair, 7, 8 



Hair cell, 8 



Hand, 108 



Head, 173, 176, 181, 182 



Health, 44 



Hearing, 183 



Heart, 68, 69, 70, 85, 157, 158, 



175, 179, 187 

 Heart beat, 70, 74 

 Heart muscle, 69, 118 

 Heart strain, 84, 85 

 Heat, 13, 14, 18, 21, 46, 53, 80, 



82, 83 

 Heat, sensation of, 83 

 Hemoglobin, 77, 78 

 Herbivorous animals, 51 

 Hepatic glands, 150 

 Hermaphroditic organisms, 170, 



175 

 Hexapoda, 182 

 Hinge joints, 109, 110, 178 

 Hip bone, 106 

 Hoofs, 187 



Hydra, 136, 137, 139 

 Hydroid, 138, 140, 142, 145, 



146 

 Hydrocarbons (see Fats), 52, 



53 

 Hydrogen, 17, 52, 53 

 Hygiene, 62 

 Hypostome, 139 



Impulse, nervous, 113 

 Indigestion, 64, 65 

 Influence of pressure, 25 

 Ink, 159 



Insects, 103, 182. 184, 

 Inspiration, 38, 39, 42, 72 

 Internal respiration, 39 

 Intestine, 50, 58, 164, 186 

 Involuntary muscle, 100, 101 

 Iodine, 12 



Irritability, 99-120; of proto- 

 zoa, 9, 10, 11, 128; of ccelen- 

 terata, 141; of starfish, 150; 

 of earthworms, 162; of lob- 

 sters, 176, 177; of vertebrata, 

 185; of plants, 189 



Jaws, 176 



Jellyfish, 137, 138, 140, 141, 

 145, 146 



Joints, 104, 109, 110, 178 



Kidneys, 59, 60, 61, 62, 186 



Lacteals, 58, 81 



Lady bugs, 184 



Large intestine, 58 



Larvae, 180, 183, 184 



Law, 21, 44 



Leaf, 13, 16 



Leech, 172 



Leg, 105, 106, 107, 108 



Legs, 182 



Ligament, 104 



Light, 190 



Lime water, 18, 190 



Lines of growth, 155 



Lingual ribbon, 160 



Lipase, 56 



Liquid, 13, 14, 22 



Liver, 57, 58, 76, 150, 152, 159, 



174, 179, 186 

 Living matter, 2, 7, 9, 21, 45, 



87 (see characteristics of) 

 Lobster, 49, 103, 173, 176 

 Locomotion, 126; of protozoa, 



129; of coelenterata, 141, 142; 



of starfish, 150, 151; of clam, 



155; of earthworm, 162, 163; 



of lobster, 176, 177, 180 

 Locust, 184 

 Lungs, 33, 34, 38, 41, 59, 181, 



186 

 Lung membrane, 44, 60 

 Lymph, 81 

 Lymph hearts, 81 

 Lymphatics, 81 



Magnesium, 17 



Malaria, 128 



Male, 91 



Malpighian tubes, 174, 182 



Maltose, 56 



Mammal, 188 



Manv-celled animals, 43, 47, 89, 



99^ 125, 135, 143 

 Mandibles, 178 

 Mantle, 154, 155 

 Mantle chamber, 156 

 Matter, 13 

 Maxilla, 178 



