Spleen Histology Identification Quiz

Epithelial Tissue

• Epithelial tissue is characterized by its close proximity of cells, with minimal extracellular space between them.

Thymus

• The Thymus is a primary lymphoid organ that plays a crucial role in the development of T lymphocytes (T cells).

T Cell Entry into the Thymus

• T cells enter the Thymus through blood vessels.

Cortex and Medulla of the Thymus

• The cortex of the Thymus is the outer region that is densely packed with immature T cells.
• The medulla of the Thymus is the inner region that contains more mature T cells.

T Cell Maturation in the Thymus

• The maturation of T cells in the Thymus must occur in a controlled environment to prevent the generation of self-reactive T cells that could attack the body's own tissues.

Thymus Capsule

• The thick white capsule surrounding the Thymus serves to isolate the Thymus from external influences and create a protected environment for T cell maturation.

s’Hassall Corpuscles

• s’Hassall corpuscles are concentric layers of epithelial cells found in the medulla of the Thymus.
• Their function is unclear but may involve the regulation of T cell development and activity.

Keratin-Stained Epithelial Tissues

• Keratin-stained epithelial tissues (keratinized) have a unique characteristic of having a tough, protective outer layer of keratin protein.
• This distinguishes them from other types of epithelial tissues which lack this feature.