Adrenal gland capsule

The thick capsule of dense irregular connective tissue that surrounds each adrenal gland and contains scattered elastic fibers; the capsule contains a rich plexus of blood vessels (mainly small arteries) and numerous nerve fibers; some blood vessels and nerves enter the substance of the gland in the trabeculae that extend inward from the capsule and then leave the trabeculae to enter the cortex.