In veterinary histology, which specific cells located within the seminiferous tubules are responsible for forming the blood-testis barrier through their tight junctions?

Which portion of the male reproductive tract is histologically characterized by a pseudostratified columnar epithelium with long, non-motile stereocilia and is the primary site for sperm maturation and storage?

Regarding the interstitial tissue of the testes, which cells are characterized by an abundance of smooth endoplasmic reticulum and mitochondria with tubular cristae, and are responsible for the synthesis of testosterone?

In the histology of the ductus deferens, which layer is notably thick and composed of three distinct sub-layers of smooth muscle arranged in inner longitudinal, middle circular, and outer longitudinal patterns?

Which histological feature is characteristic of the efferent ductules (ductuli efferentes) that distinguishes them from the epididymis?

In the male reproductive system of domestic animals, which accessory sex gland is histologically identified by the presence of 'prostatic sand' or concretions (corpora amylacea) within its secretory alveoli, especially as the animal ages?

During the process of spermiogenesis, which organelle is responsible for the formation of the acrosomal vesicle that covers the anterior half of the condensing nucleus?

In the stallion and boar, the vesicular glands (seminal vesicles) are characterized by which histological feature in their secretory units?

Which specific histological structure consists of an anastomosing network of tubules lined by simple squamous to low cuboidal epithelium, located within the mediastinum testis, and serves to collect sperm from the seminiferous tubules?

Which histological structure in the mammalian male reproductive system consists of a complex plexus of veins that surrounds the highly coiled testicular artery and plays a critical role in thermoregulation via a counter-current heat exchange mechanism?