
Stroma and parenchyma
Hormone-secreting, endocrine cells form the parenchyma in this pituitary gland. The stroma of the gland is formed by collagen fibers, providing a sturdy framework for the organ. This section is specially stained by the Masson method, which demonstrates the collagen well. The stroma also conveys blood vessels into the organ. 400x

Parenchyma
Hormone-secreting, endocrine cells form the parenchyma in this pituitary gland. The stroma of the gland is formed by collagen fibers, providing a sturdy framework for the organ. This section is specially stained by the Masson method, which demonstrates the collagen well. The stroma also conveys blood vessels into the organ. 400x

Blood vessels
Hormone-secreting, endocrine cells form the parenchyma in this pituitary gland. The stroma of the gland is formed by collagen fibers, providing a sturdy framework for the organ. This section is specially stained by the Masson method, which demonstrates the collagen well. The stroma also conveys blood vessels into the organ. 400x

Stroma
Hormone-secreting, endocrine cells form the parenchyma in this pituitary gland. The stroma of the gland is formed by collagen fibers, providing a sturdy framework for the organ. This section is specially stained by the Masson method, which demonstrates the collagen well. The stroma also conveys blood vessels into the organ. 400x