Tissue of Eyelid

Connective, Epithelial, Muscular, Nervous

Squamous, Columnar, Cuboidal

Way of excretion

Secretes to an outside surface (sweat and oil)

Secretes directly into the bloodstream (hormones)

Holocrine: Secrete complete cells Apocrine: Secrete parts of cytoplasm Merocrine: Secrete non-cellular components

Meibomian glands, Zeiss Gland

Moll Gland

Lacrimal Gland

Cells, Fibers, Ground Substance, and Extracellular Matrix

Fibroblasts (make ECM), Macrophages (engulf cellular debris), collagen + elastin, Mast cells (secrete histamine), Chromatophores/Melanocytes (pigment cells)

Loose

Dense

Astocytes (structure), Microglia (immune response), Oligodendrocytes (Myelin Sheath), Schwann cells (all of the above)

Schwann Cells

Tunica Externa

Tunica Media