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2 Nov Embriologia del ojo humano pdf – File size: Kb Version: Date added: 29 Sep Price: Free Operating systems: Windows. 6 Feb Embriología humana. El conocimiento del desarrollo prenatal del ser humano resulta de gran impor-tancia para poder comprender. Scribd is the world’s largest social reading and publishing site.

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The blastula stage typically features a fluid-filled cavity, the blastocoel, surrounded by a sphere or sheet of cells, in a placental mammal, an ovum is fertilized in a fallopian tube through which it travels into the uterus.

Embriología del ojo

However, when taller simple columnar epithelial cells are viewed in cross section showing several nuclei appearing at different heights and this hhumano of epithelium is therefore described as pseudostratified columnar epithelium. In animals, embriologia del ojo humano development of the zygote into an embryo proceeds through specific stages of blastula, gastrula. El ectodermo superficial formara el cristalino y el epitelio de la cornea.

Embryos and one tadpole of the wrinkled frog Rana rugosa. The vitreous body lies at the back of the eyebetween the lens and the retina. Check out this article to learn more or contact your system administrator.

As the lens expands in embriologia del ojo humano accommodation, its volume increases and this results in compression of the hyaloid canal, so embriologia del ojo humano the volume of embriologia del ojo humano eye remains constant 6. For example, at the age of 15, the dark-adapted pupil can vary from 4 mm to 9 mm with different individuals.

Types of fibers, Connective tissue has a variety of functions that depend on the types of cells. This causes the effect in one eye to carry over embriolgia the other, the pupil gets wider in eel dark but narrower in light. Furthermore, the pupil will dilate if a person sees an object of interest, certain drugs cause constriction of the pupils, such as opioids.

In the primate fovea the ratios of ganglion cells to photoreceptors humxno about 2.

Embriologia del ojo y oido by Raul Hurtado on Prezi

An embryo is called a fetus at an advanced stage of development. It is composed mostly of phagocytes, which remove unwanted cellular debris in the field, and hyalocytes. During the tenth week of development in humans, the lens grows independent of a blood supply and its proximal portion remains as the central artery of the retina.

A human embryo, seven weeks old or from the ninth week of pregnancy. Illu connective tissues 2. Normal anatomy of the human eye and orbit, anterior view. Characteristics of CT, Cells are spread through an extracellular fluid, ground substance – A clear, colorless, and viscous fluid containing glycosaminoglycans and proteoglycans to fix the body water and the collagen fibers in the intercellular spaces.

The parafovea extends to a radius of 1. The ciliated type is called respiratory epithelium as it is almost exclusively confined to the larger respiratory airways of the nasal cavity, trachea. The iris is a structure, consisting mainly of smooth muscle. An egg may be fertilized in vitro and the embryo may be embriologia del ojo humano for later use.

They also allow organs to resist stretching and tearing forces, elastic fibers, made from elastin and embriologia del ojo humano, also provide resistance to stretch forces. Embriologia del ojo humano general, simple epithelial tissues are classified by the shape embriologia del ojo humano their cells, the four major classes of simple epithelium are, simple squamous, simple cuboidal, simple columnar, pseudostratified.

Embriología del ojo – WikiVisually

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The vitreous embriologia del ojo humano concentration rises so predictably within the hours, days and weeks after death and its composition is similar to that of the cornea, but the vitreous contains very few cells. The light circle embriologiaa the optic disc where the optic nerve exits the retina.

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The sensory pathway is linked with its counterpart in the eye by a vel crossover of each eyes fibers. In embriologia del ojo humano the pupil is round, but other species, such as cats, have vertical slit pupils, goats have horizontally oriented pupils.

Send this link to let embriologia del ojo humano join your presentation: Creating downloadable prezi, be patient. Tejido conjuntivo — Connective tissue is one of the four types of biological tissue that supports, connects or separates different types of tissues and organs in the body.

These cones are very densely packed, starting at the outskirts of the fovea, however, rods gradually appear, and the absolute density of cone receptors progressively decreases. The pupil is a hole located in the center of the iris of embrioligia eye that allows light to strike the retina.

These embriologia del ojo humano floaters which are perceived in the field as spots or fibrous strands. Blood and lymph lack the fiber component, all are immersed in the body water.

Constrain to simple back and forward steps. Cell junctions are well-employed in epithelial tissues, in general, epithelial tissues are classified by the number of their layers and by the shape and function of the cells. De Wikipedia, la enciclopedia libre. Simple cuboidal, these cells may have dle, absorptive, or excretory functions, examples include embriologia del ojo humano collecting ducts of kidney, pancreas and salivary gland.