Via respiratória

Vias respiratórias são assim denominadas as estruturas responsáveis pelo transporte do ar aos pulmões no organismo humano. Essas estruturas são anatomicamente separadas em:

O epitélio respiratório (pseudoestratificado, ciliado, não-queratinizado) é a mucosa que reveste boa parte do trato respiratório, estendendo-se das Cavidade Nasal até os brônquios. Esse muco é responsável pela filtração, aquecimento, e humidificação do ar inspirado. A filtração é possível graças à presença de muco secretado pelas células caliciformes e dos cílios que orientam seus batimentos em direção à faringe, impedindo a entrada de partículas estranhas no pulmão; enquanto o aquecimento é garantido pela rica vascularização do tecido, principalmente nas fossas nasais.

A traqueia é formada por anéis incompletos de cartilagem em forma de "C", feixes musculares lisos, uma capa interna de epitélio respiratório, e mais externamente de tecido conjuntivo que envolve todas essas estruturas. Inferiormente se subdivide e dá origem a dois brônquios que penetram no pulmão pelo hilo do pulmão.

Os brônquios à medida que penetram no pulmão, vão sofrendo sucessivas ramificações até virarem bronquíolos terminais.

Via administração

A via respiratória é uma via de administração de medicamentos pelo sistema respiratório, por inalação do fármaco sob a forma de gás ou em pequenas partículas líquidas ou sólidas, geradas por nebulização ou aerossóis.[1]


Referências

  1. ↑ VIAS DE ADMINISTRAÇÃO DE MEDICAMENTOS E TÉCNICAS DE INJEÇÕES, pág. 11
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