| intervillous spaces | The space's containing maternal blood, located between placenta villi; they are lined with syncytiotrophoblast. (05 Mar 2000) |
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| zonular spaces | The spaces between the fibres of the ciliary zonule at the equator of the lens of the eye. Synonym: spatia zonularia, Petit's canals. (05 Mar 2000) |
| Kuhnt's spaces | Shallow diverticula or recesses between the ciliary body and ciliary zonule which open into the posterior chamber of the eye. (05 Mar 2000) |