Origami Model for Breathing Alveoli
We previously proposed a morphogenesis-based 4D model of the alveolar structure. However, the model exists only in computer, and is too complicated to be recognized in 2D display. Origami, a Japanese traditional craft, is a 4D object originated from 2D sheet. We introduce origami models approximating our computational alveolar model. One can make, see, and handle the models by oneself. Seeing is believing. We dare say “Making is convincing”.
KeywordsAlveolar Structure Morphogenetic Process Living Organ Alveolar Duct Alveolar Model
1 Similarity of Origami and the Living Organ
The living organ changes its shape from sheet-like arrangement of primitive cells to mature 3D structure through morphogenetic process. Functions of the living organ are realized by periodic changes in spatial arrangement of tissue elements of the organ. Origami, a Japanese traditional craft, is also a 3D structure originated from a sheet of paper. Origami is not fixed but movable by changing folding angles. Thus, both the living organ and origami are 4D systems originated from 2D sheet. If the structure, function, and morphogenesis of the organ can be expressed by origami, the origami model will be very useful for deeper understanding of the organ, because one can make, see, and handle it by oneself. The model will be also useful for developing artificial organs and biomimetic applications.
2 Four-Dimensional Model of the Alveolar Structure
3 Origami Model for a Single Alveolus
4 Origami Model for an Alveolar Duct
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