Page:First course in biology (IA firstcourseinbio00bailrich).pdf/639

 Mycelium, 107, 108, 188.

Mychorrhiza, 108.

Nails, 19.

Narcotic, 137, 148.

Nasal tone, 144.

Natural selection, 8,  148.

Nautilus, chambered, 107.

Nectar, 8,  148.

Nephridium, 45.

Nerve, 119; spinal, 127; cranial, 127.

Nerve cell, 119; fatigue of, 130.

Nerve center, 117, 120.

Nerve fiber, 119.

Nerve tissue, 11.

Nerves, vaso-motor, 23.

Nervous children, 135.

Nervous system, of bee, 78; of man, 117; of mussel, 102.

Nest building, 166, 182.

Neuron, 118.

Neuroptera, 82.

Neutral substances, ix.

Nitella, 187.

Nitric acid test for proteid, xi.

Nitrogen, viii, 39, 40,  81.

Nitrogenous compounds, xi.

Nodes, 20, 52.

Nodules, 39, 40.

Nose bleed, 52.

Nostoc, 184.

Nostril, of bird, 151; of fish, 112.

Notebooks, 3.

Nucleolus, 6,  6.

Nucleoplasm, 7.

Nucleus, 144, 185,  6, 11, 14,  6, 18.

Nutrients, 91.

Nuts, 164,  95.

Octopus, 106.

Oil gland, 20.

Oils, test for, xi.

Okapi, 214.

Oleander, 86.

Omnivorous, 47,  111.

One-celled animals, 7.

Oögonia, 186.

Opossum, 197;  4.

Opsonin, 162.

Optic nerve, 151, 152.

Oral surface, 35.

Orang, 227.

Orbit, 149.

Orchid, 35, 110.

Order, 9.

Organ, 1,  9.

Organic, xiv, 1.

Organism, 1.

Orthoptera, 82.

Oscillatoria, 184.

Osculum, 18.

Osier, Dr. William, quoted, 133.

Osmosis, 42, 48.

Outdoor life, 5, 22.

Ovary, 135, 144, 163, 170,  25, 37. 117.

Overgrowth, 12.

Oviduct, 46.

Ovule, 144, 186.

Oxidation, xii, 3, 4, 5,  14, 90, 91, 120.

Oxygen, viii, 4, 5,  4, 76, 81, 140.

Oyster, 104.

Palisade cells, 86.

Palmate, 74.

Pancreas, 104.

Panicle, 158.

Papilla, 17.

Pappus, 141.

Paramecium, 13.

Parasites, 107,  49, 93.

Parenchyma, 60, 86.

Partridge, 178.

Pearls, 105.

Peccary, 217.

Pedicel, 162.

Peduncle, 62.

Peltate, 77.

Pelvis, 33.

Pepsin, 103.

Perch, 109, 110, 123.

Perennial, 17.

Pericarp, 164, 165, 169.

Peristalsis, 102, 106, 127.

Peritoneum, 106.

Pests, insect, 93.

Petals, 134.

Petiole, 76

Phagocyte, 161.

Pharynx, 73, 85, 101.

Pheasant, 174.

Phenogam, 177, 180.

Phosphorus, vi.

Photo-synthesis, 94, 101.

Phyllotaxy, 84.

Physics, xiv.

Physiology, 9.

Pigment, 18.

Pine cone, 27, 170.