Task: Class Definition Understanding (ontology: Sciences/Biology)

Which of the following definitions best describes 'peritubular myoid cell'?

A. The flattened smooth myoepithelial cells of mesodermal origin that lie just outside the basal lamina of the seminiferous tubule.
B. A myoepithelial cell that is part of the sweat gland.
C. A myoepithelial cell that is part of a mammary gland and is located in the the concept layer. During lactation, a the concept contracts under the stimulation of oxytocin. In humans, a the concept can be identified by high levels of CD49f and low levels of EpCAM.
D. A myoepithelial cell that is part of the quarternary lactiferous duct.

Answer: The flattened smooth myoepithelial cells of mesodermal origin that lie just outside the basal lamina of the seminiferous tubule.