Examlex
F plasmids and oftentimes R plasmids are both able to code for production of a pilus.
Septum Primum
First septum in the embryonic heart that arises on the wall of the originally single atrium of the heart and separates it into right and left chambers.
Interatrial Septum
The wall of tissue that separates the right and left atria of the heart.
Septum Secundum
Second of two major septal structures involved in the partitioning of the atrium, arising later than the septum primum and located to the right of it; it remains an incomplete partition until after birth, with its unclosed area constituting the foramen ovale.
Foramen Rotundum
An opening in the sphenoid bone of the skull through which the maxillary branch of the trigeminal nerve passes.
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