Friday, 20 February 2015

The Blood Circulation


The circulatory system or circulatorioa system is the anatomical structure composed of the cardiovascular system leading ago and circulate blood, and lymphatic system leading lymph unidirectionally toward the heart. In humans, the cardiovascular system consists of the heart, blood vessels (arteries, veins and capillaries) and blood, and lymphatic system is comprised of lymphatic vessels, lymph, the lymphoid organs (spleen and thymus), bone marrow, lymphoid tissues (such as the amygdala and Peyer's patches) and lymph.

Blood is a fluid type specialized connective tissue with a liquid colloidal matrix, a complex and a characteristic red color constitution. Is a solid phase (formed elements, including leukocytes (white blood cells), erythrocytes (or red blood cells), platelets and a liquid phase, represented by blood plasma.

Lymph is a clear fluid that runs through the lymphatic vessels and pigments generally lacks. It occurs after the excess fluid from the capillaries into the interstitial or intercellular space, and is picked up by the lymphatic capillaries that drain thicker lymph vessels to converge in ducts that empty into the subclavian veins.

The main function of the circulatory system is to pass nutrients (such as amino acids, electrolytes and lymph), gases, hormones, blood cells, among others, body cells, metabolic waste collected to be eliminated by the kidneys after in the urine and exhaled air in the lungs, rich in carbon dioxide (CO2). In addition, defends the body against infection and helps to stabilize the temperature and pH to maintain homeostasis.

Study At Belgium


A stay of more than 90 days is considered long stay. In this case, a national visa must be requested. The treatment period is in most cases several months. The city administration in Belgium, changed the visa for residence permit at the time the student reaches Belgium and register. With a short-stay visa can not acquire a residence permit.

1. Information on some documents to Colombian applicants for long-stay visa

Any document civilian: birth certificate or marriage registration.

Certificate of Legal History (this document is downloaded from the website of the National Police of Colombia)

Authorization departure of a minor

Of-court statement (statement of cohabitation, statement of economic dependence, etc.)

Any document issued by Colombian authorities require apostille apostille translation and translation.

Translation and apostille documents issued by Colombian authorities takes place in the Ministry of

Foreign Affairs of Colombia.

These documents are translated into French, Dutch or German.

The list of official translators is on the website of the Ministry of Foreign Affairs of Colombia.