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The function of the parts of eyePart Function

Palpebral, eyelashes, eyebrows Eye protection

lacrimal gland) Produce lacrimal. Lacrimal secretion containing mucus, salt,

and antibacterial enzymes lizozim. To : cleaning, protecting,

moisturizing and lubricating the eye surface (conjunctiva and

cornea)

Tarsal glands Produce an oily secretion that forms a layer on the surface ofthe tear film. This function prevents the evaporation of the

tear film

Sweat glands Produce secretions that are drawn to the eyelash follicles

Cornea Transmits light and focuses the light beam

Sclera Maintain eye shape and protect delicate structures beneath

and as a attachment point for muscles extrinsic

Humour aquous Is a product of epithelial siliaris that flowing into the camera

eye anterior and posterior. It will rinse the cornea and lens

nonvascular and deliver nutrients and oxygen

Pupil The entry of light into the interior of the eye

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Part Function

Iris Set the amount of light entering the eye. The muscles of the

iris: smooth muscle

- When the circular muscle contraction will shrink pupils,

stimulated by the light that protects the retina

- Radial muscles from the edge of the pupil, the contract cause

dilated pupils. When the light is weak, the muscles contract it

cause pupillary dilation to include more light

Choroid Preventing internal retina reflection light beam, give the

nutrients to the retina and vitreous corpus, and can pull thesuspensory ligament

Lensa Role in the refraction of light (refraction) and also bend the

light to be focused on the retina

Lens capsule: change the shape of the lens and protects the

corpus vitreous and aquosus humor, and was instrumental in

the process of accommodation

The corpus vitreous Deliver incoming light, is nonrefractive in relation to the lens,

forming role intraocular eye pressure, and hold the retina in

the pigmented layer of the eyeball

Retina Photoreceptor

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The main function of skin:1. protection

Epithelial-coated with a layer of horn protects against mechanical abrasion

of the body surface and form a physical barrier against foreign pathogensor other microorganisms. Because there glycolipid layer between thestratum granulosum, epidermis also permeable to water. This layer alsoprevents the loss of body fluids through dehydration. Increased synthesisof the melanin pigment to protect the skin from ultraviolet radiation

2. temperature regulationSweating allows partial loss of body heat through the evaporation of sweatfrom the body surface. In addition to sweat, thermoregulation involvesdilation of blood vessels allowing maximum blood flow to the skin. Thisfunction increases the heat expenditure. And in the cold temperatures,body heat is maintained by constricting blood vessels and decrease bloodflow to the skin

3. sensory perception

In the skin there are many sensory nerves

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