Figure 23.7 The Gross Anatomy of the Lungs

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Figure 23.7 The Gross Anatomy of the Lungs
Figure 23.7
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Figure 23.7 The Gross Anatomy of the Lungs
Figure 23.7
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Figure 23.10 The Bronchi and Lobules of the Lung
Figure 23.10b
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Figure 23.12 Alveolar Organization
Figure 23.12a-c
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• Lung buds lined by endodermally derived
• epitheliumdifferentiates into respiratory
• epithelium, which lines airways and
• specialized epithelium that lines the alveoli
• Ectoderm-contributes to innervation
• Mesoderm- blood vessels, smooth muscle,
• cartilage and other connective tissue

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• Hormonal Influence on the Lung
• Corticotropin stimulates cortisol
• Cortisol stimulates fetal lung fibroblast to
• produce fibroblast pneumocyte factor,
• which,
• Stimulates surfactant production in Type 2
• cells
• Thyroid hormone is also necessary for
• surfactant production

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• Physical Influences on Lung Growth
• Congenital diaphragmatic hernia
• Musculoskeletal abnormalities of the chest
• wall
• Space occupying lesions of the thorax, e.g.
• pleural effusions
• Oligohydramnios associated with renal or
• urinary tract abnormalities

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