#Vascular tunic skin

It also contributes to immune surveillance and helps to prevent the entrance of microbes into the eye. Palpebral conjunctiva is very vascular and dense subepithelial layer of capillaries, and contains mucosa-associated lymphoid tissue, it is continuous with the skin, lining epithelium of the ducts of the tarsal glands, and with the lacrimal canaliculi, sac and hence the nasolacrimal duct and nasal mucosa.It helps lubricate the eye by producing mucus and tears, although a smaller volume of tears than the lacrimal gland. The Bulbar conjunctiva is thin and transparent and slightly vascular. There are two parts: Bulbar conjunctiva that covers the Sclera loosely connected to the eyeball and the Palpebral conjunctiva that lines the inner surface of the upper and lower lids. Related StructuresConjunctiva: A transparent and mucosal membrane that extends from the junction of the cornea and the Sclera to the inner portion of the eyelid. Pairs of ciliary sebaceous glands and ciliary sweat glands open into the eyelash follicles.Eye brows: located above the eyes and play protective role similarly to the eye lashes. Related StructuresEye lashes: Hair follicles growing at the end of the eye lids, protecting the eyeballs from foreign bodies, perspiration and direct sun rays. Related StructuresEye lids Blinking: is to spread the tear film over the cornea.12 Blinks/minBlink lasts in average 0.3 of second30 mm wide15 mm highPalpebral Fissure These glands are modified sebaceous glands, secreting oily secretions that spread over the margins of the eyelids, reducing evaporation and contributing to tear film stability and inhibiting the overflowing of tears on the face. The tarsal glands are yellow and arranged in a single row of about 25 in the upper lid and fewer in the lower lid. Related StructuresThe tarsal plate is thin and elongated made up of firm and dense fibrous tissue which determines the eye lid form.

#Vascular tunic skin

These are skin tissues consisting of subcutaneous connective tissue, Orbicularis Oculi muscle, tarsal plate and tarsal glands (Meibomian gand) secreting oily substance for lubrication and innermost mucosal conjunctiva tissue.

Related StructuresEye lids or Palpebrae are thin and moveable folds protecting the eyes from injury by rapid closure.

OverviewAdditional Structures Related to the EyeInner StructuresFibrous TunicVascular TunicNervous TunicOcular Refractive MediumInterior of the Eye BallMuscle Innervations of the eye. Anatomy of the Human Eye By Mohammed ShurrabĪnatomy of the Human EyeEng.MohammedShurrabBSc.