Definitions for "Isthmus"
A neck or narrow slip of land by which two continents are connected, or by which a peninsula is united to the mainland; as, the Isthmus of Panama; the Isthmus of Suez, etc.
A narrow connection between two larger bodies or parts.
A narrow passage connecting two larger cavities.
The section of the oviduct next to the magnum where the water and mineral salts are deposited and the inner and outer shell membranes are formed.
The section of the oviduct following the magnum; it forms the inner and outer shell membranes of the egg.
middle region of the hair follicle, which usually contains the sebaceous gland. J K
the middle region of the hair follicle which usually contans the sebaceous gland.
In desmids, the constricted region between the two semicells that usually contains the nucleus
The ventral aspect of the trunk anterior to a vertical line at the posterior margin of the operculum.
Keywords:  gill, fleshy, beneath, head, structure
the fleshy structure beneath the head and between the gill-openings
The part of the fallopian tube closest to the uterus where the embryo must travel before implantation.
Keywords:  disconnects, graph, edge, removal
an edge whose removal disconnects the graph