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Stoma of a milkweed leaf (Asclepias spp.), SEM
12539886 - Stoma of a milkweed leaf (Asclepias spp.), SEM
Capillary system, illustration
12493476 - Capillary system, illustration
Male respiratory system, illustration
13962211 - Male respiratory system, illustration
Healthy Bronchiole, 1 of 3
13495259 - Healthy Bronchiole, 1 of 3
Grasshopper and insect respiratory system, illustration
12987292 - Grasshopper and insect respiratory system, illustration
Heart and Pulmonary Circulatory System
12650490 - Heart and Pulmonary Circulatory System
Squill (Scilla sp.) stomata, light micrograph
12450451 - Squill (Scilla sp.) stomata, light micrograph
Pine needle, light micrograph
13386706 - Pine needle, light micrograph
Grasshopper and insect respiratory system, illustration
12987295 - Grasshopper and insect respiratory system, illustration
Grasshopper and insect respiratory system, illustration
12987288 - Grasshopper and insect respiratory system, illustration
Heart and Pulmonary Circulatory System
12648678 - Heart and Pulmonary Circulatory System
Squill (Scilla sp.) stomata, light micrograph
12450458 - Squill (Scilla sp.) stomata, light micrograph
Hyacinth (Hyacinthus sp.) stoma, light micrograph
12450454 - Hyacinth (Hyacinthus sp.) stoma, light micrograph
Male respiratory system, illustration
13962179 - Male respiratory system, illustration
Grasshopper and insect respiratory system, illustration
12987296 - Grasshopper and insect respiratory system, illustration
Male respiratory system, illustration
13962193 - Male respiratory system, illustration
Grasshopper and insect respiratory system, illustration
12987293 - Grasshopper and insect respiratory system, illustration
Respiratory system, illustration
13962166 - Respiratory system, illustration
Bronchiole Partially Filled with Mucus, 2 of 3
13495260 - Bronchiole Partially Filled with Mucus, 2 of 3
Rodent respiratory system, illustration
13219266 - Rodent respiratory system, illustration
Capillary system, illustration
12493480 - Capillary system, illustration
Pine (Pinus sp.) needle, light micrograph
12450540 - Pine (Pinus sp.) needle, light micrograph
Male respiratory system, illustration
13962201 - Male respiratory system, illustration
Healthy Lung vs. Smoker's Lung
13495282 - Healthy Lung vs. Smoker's Lung
Grasshopper and insect respiratory system, illustration
12987290 - Grasshopper and insect respiratory system, illustration
Male respiratory system, illustration
13962174 - Male respiratory system, illustration
Bronchiole Constricted by Tightened Muscle, 2 of 3
13495263 - Bronchiole Constricted by Tightened Muscle, 2 of 3
Capillary system, illustration
12493481 - Capillary system, illustration
Plant leaf and stomata,illustration
12099178 - Plant leaf and stomata,illustration
Alveoli, illustration
12504632 - Alveoli, illustration
Capillary system, illustration
12493479 - Capillary system, illustration
Squill (Scilla sp.) stomata, light micrograph
12450457 - Squill (Scilla sp.) stomata, light micrograph
Plant stomata, light micrograph
12420844 - Plant stomata, light micrograph
Leaf stomata (Ohia Lehua tree; Metrosideros polymorpha), SEM
12378170 - Leaf stomata (Ohia Lehua tree; Metrosideros polymorpha), SEM
Male respiratory system, illustration
13962194 - Male respiratory system, illustration
Alveoli, illustration
12641865 - Alveoli, illustration
Bark of paper Birch, Betula papyrifera
12504175 - Bark of paper Birch, Betula papyrifera
Squill (Scilla sp.) stomata, light micrograph
12450453 - Squill (Scilla sp.) stomata, light micrograph
Stoma of a milkweed leaf (Asclepias spp.), SEM
12378141 - Stoma of a milkweed leaf (Asclepias spp.), SEM
Male Chest Revealing Heart and Lungs
13495266 - Male Chest Revealing Heart and Lungs
Lung structure,illustration
12960230 - Lung structure,illustration
Idiopathic Pulmonary Fibrosis, illustration
12641866 - Idiopathic Pulmonary Fibrosis, illustration
Idiopathic Pulmonary Fibrosis, illustration
12641864 - Idiopathic Pulmonary Fibrosis, illustration
Healthy Lungs, illustration
12641501 - Healthy Lungs, illustration
Tubular myelin in alveolar lung fluid, TEM
12491960 - Tubular myelin in alveolar lung fluid, TEM
Plant stomata, LM
12394312 - Plant stomata, LM
Bronchial tree, illustration
13959183 - Bronchial tree, illustration
Lily (Lilium sp.) stomata, light micrograph
12450491 - Lily (Lilium sp.) stomata, light micrograph
Primate, reptile and fish blood circulation, illustration
12349531 - Primate, reptile and fish blood circulation, illustration
Male respiratory system, illustration
13962175 - Male respiratory system, illustration
Bronchial Hyperreactivity, 3 of 3
13495264 - Bronchial Hyperreactivity, 3 of 3
Pine (Pinus sp.) needle, light micrograph
12450541 - Pine (Pinus sp.) needle, light micrograph
Stoma of a leaf (Dahlia sp.), SEM
12378137 - Stoma of a leaf (Dahlia sp.), SEM
Male respiratory system, illustration
13962165 - Male respiratory system, illustration
Capillary system, illustration
12493478 - Capillary system, illustration
Breathing,conceptual image
11720485 - Breathing,conceptual image
Lily of the valley leaf, light micrograph
12450480 - Lily of the valley leaf, light micrograph
Alveoli in the lung,illustration
11720477 - Alveoli in the lung,illustration
Male Thorax Showing Trachea and Lungs
13495276 - Male Thorax Showing Trachea and Lungs
Air Leaving Lungs
13495265 - Air Leaving Lungs
Lily (Lilium sp.) stomata, light micrograph
12450492 - Lily (Lilium sp.) stomata, light micrograph
Male lungs, illustration
13958945 - Male lungs, illustration
Lung Alveoli, illustration
12641867 - Lung Alveoli, illustration
Hyacinth root, light micrograph
12581469 - Hyacinth root, light micrograph
Infected pine (Pinus sp.) needle, light micrograph
12450542 - Infected pine (Pinus sp.) needle, light micrograph
Lily (Lilium sp.) stomata, light micrograph
12450493 - Lily (Lilium sp.) stomata, light micrograph
Lily of the valley leaf, light micrograph
12450486 - Lily of the valley leaf, light micrograph
Alveoli, illustration
13171116 - Alveoli, illustration
Squill (Scilla sp.) stomata, light micrograph
12450455 - Squill (Scilla sp.) stomata, light micrograph
Crocus sp. stomata, light micrograph
12396128 - Crocus sp. stomata, light micrograph
Stoma of a broad bean leaf (Vicia faba), SEM
12301509 - Stoma of a broad bean leaf (Vicia faba), SEM
Stoma of a milkweed leaf (Asclepias spp.), SEM
12301490 - Stoma of a milkweed leaf (Asclepias spp.), SEM
Grape hyacinth stomata,light micrograph
11721893 - Grape hyacinth stomata,light micrograph
Alveoli,artwork
11702178 - Alveoli,artwork
Stoma structure, illustration
13743907 - Stoma structure, illustration
Lenticels of Betula Jacquemontii
12504172 - Lenticels of Betula Jacquemontii
Squill (Scilla sp.) stomata, light micrograph
12396124 - Squill (Scilla sp.) stomata, light micrograph
Plant leaf trichome (Hibiscus sp.), SEM
12378166 - Plant leaf trichome (Hibiscus sp.), SEM
Alveolar cell,TEM
12050122 - Alveolar cell,TEM
Tulip stomata,light micrograph
11721889 - Tulip stomata,light micrograph
Oak Leaf Stoma (Quercus robur)
11688397 - Oak Leaf Stoma (Quercus robur)
Aeration pattern in lungs, 3D CT scan
12642952 - Aeration pattern in lungs, 3D CT scan
Hyacinth root, light micrograph
12581472 - Hyacinth root, light micrograph
Lung alveoli, SEM
12527490 - Lung alveoli, SEM
Hyacinth root, light micrograph
12581473 - Hyacinth root, light micrograph
Lungs, illustration
12504698 - Lungs, illustration
Capillary system, illustration
12493477 - Capillary system, illustration
Lily (Lilium sp.) stomata, light micrograph
12450496 - Lily (Lilium sp.) stomata, light micrograph
Squill (Scilla sp.) stomata, light micrograph
12450459 - Squill (Scilla sp.) stomata, light micrograph
Stoma of a leaf (Dahlia sp.), SEM
12301478 - Stoma of a leaf (Dahlia sp.), SEM
Lily of the valley stomata,micrograph
11721865 - Lily of the valley stomata,micrograph
Male respiratory system, illustration
13962185 - Male respiratory system, illustration
Nasal Passageway, Trachea and Bronchial Tubes
12642516 - Nasal Passageway, Trachea and Bronchial Tubes
Lung bronchioles and blood vessels, 1866 illustration
12581696 - Lung bronchioles and blood vessels, 1866 illustration
Squill (Scilla sp.) stomata, light micrograph
12396126 - Squill (Scilla sp.) stomata, light micrograph
Meristem differentiating into an epidermal cell., SEM
12301733 - Meristem differentiating into an epidermal cell., SEM
Stomata of scouring rush (Equisetum sp.), SEM
12301491 - Stomata of scouring rush (Equisetum sp.), SEM
Leaf anatomy,illustration
11703728 - Leaf anatomy,illustration
Alveoli, illustration
13171114 - Alveoli, illustration
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