Sensory system and skin

Ciliary (ciliary) body

The ciliated, or ciliary, body (corpus ciliare) is the middle thickened part of the vascular tract of the eye that produces the production of intraocular fluid.

In children of the first year of life, the pupil is narrow (about 2 mm), weakly responds to light, does not expand well. In the normal eye, the pupil value continuously changes from 2 to 8 mm under the influence of changes in illumination.

Vitreous body

The vitreous humor is a transparent, colorless, gel-like substance that fills the cavity of the eyeball. The front of the vitreous body is: the lens, the zonular ligament and the ciliary processes, and the back and sides are the retina.

Sclera

The sclera is 5% of the dense fibrous membrane of the eye and performs a protective and skeletal function, ie, it determines and ensures the shape of the eye. It is opaque, has a shiny white, tendon-like appearance.

Tear fluid

The lacrimal fluid is clear or slightly opalescent, with a slightly alkaline reaction and an average relative density of 1.008. The lacrimal fluid contains 97.8% water, the rest are protein, urea, sugar, sodium, potassium, chlorine, epithelial cells, mucus, fat.

Accommodation. Dynamic refraction of the eye

In natural conditions, in accordance with the tasks of visual activity, the refractive force of the optics of the eye is constantly changing, that is, the dynamic refraction of the eye is not static but dynamic. The basis for such changes in refraction is the mechanism of accommodation.

Optical system of the eye

The human eye is a complex optical system that consists of the cornea, the anterior chamber moisture, the lens and the vitreous. The refractive force of the eye depends on the radius of curvature of the anterior surface of the cornea, the anterior and posterior surfaces of the lens, the distances between them and the refractive indices of the cornea, the lens, watery moisture and vitreous humor.

Breast (breast)

The mammary gland (glandulae mammaris, s. Mamma, from the Greek mastos) is a paired organ, by origin is a modified sweat gland. In men, iron remains underdeveloped.

Sweat glands

The sweat glands (glandulae sudoriferae) are simple, tubular, lying in the deep sections of the dermis, where the initial section is folded in the form of a glomerulus. A long excretory duct permeates the skin and epidermis and opens on the surface of the skin with a hole - sometimes sweat.

Sebaceous glands

Sebaceous glands (glandulae sebacae) are simple alveolar in structure glands, are located shallowly, at the border of the papillary and reticular layers of the dermis. Protocols of the sebaceous glands usually open in the hair follicle.

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