Boyden E A
Am J Anat. 1976 Sep;147(1):109-12. doi: 10.1002/aja.1001470110.
These figures of a silicon-rubber-injected fetal human lung illustrate the precocious development of filaments (future alveolar ducts) of the pulmonary acini. In contrast, there is a long delay in the differentiation of respiratory bronchioles. The former are the first to sustain respiration.
这些注入硅橡胶的人类胎儿肺部图像显示了肺腺泡细丝（未来的肺泡管）的早熟发育。相比之下，呼吸性细支气管的分化则有很长的延迟。前者是最先维持呼吸的结构。
