Term:
Ovule columns
Ovule columns
Definition:
The number of vertical lines of ovules from the base to the apex of the placenta. The number of horizontal layers of ovules in a locule. A longitudinal section that removes the outside wall of a locule allows this feature to be seen with the most accuracy. It can also be observed in a medial longitudinal section. A longitudinal section that removes the outside wall of a locule allows this feature to be seen with the most accuracy. It can also be observed in cross sections through the placenta.
The number of vertical lines of ovules from the base to the apex of the placenta. The number of horizontal layers of ovules in a locule. A longitudinal section that removes the outside wall of a locule allows this feature to be seen with the most accuracy. It can also be observed in a medial longitudinal section. A longitudinal section that removes the outside wall of a locule allows this feature to be seen with the most accuracy. It can also be observed in cross sections through the placenta.
Notes:
Usually each placental unit has 2 vertical columns of ovules in the middle of the placental unit and, because there are two placental units per locule, the total number of ovule columns is 4. There are fewer columns of ovules at the base and apex of the two combined placental units.
Usually each placental unit has 2 vertical columns of ovules in the middle of the placental unit and, because there are two placental units per locule, the total number of ovule columns is 4. There are fewer columns of ovules at the base and apex of the two combined placental units.