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Fisiologia Cardiovascular

      Prof. Vagner Sá
          UCB-RJ
Introdução
• O sistema cardiovascular é constituído por
  uma rede de vasos sanguíneos de vários tipos
  e calibres, que p...
Funções do Sistema Cardiovascular
• Transporte de gases




            http://cardiovasculogando.blogspot.com/
Funções do Sistema Cardiovascular
• Transporte de nutrientes




            http://cardiovasculogando.blogspot.com/
Funções do Sistema Cardiovascular
• Transporte de resíduos e metabólicos




            http://cardiovasculogando.blogspo...
Funções do Sistema Cardiovascular
• Transporte de hormônios




   http://www.brasilescola.com/biologia/sistema-circulator...
Funções do Sistema Cardiovascular
• Intercâmbio de Materiais




            http://cardiovasculogando.blogspot.com/
Funções do Sistema Cardiovascular
• Transporte de calor




http://nossoquintal.org/2008/01/08/calor-humano/calor/
Funções do Sistema Cardiovascular
• Distribuição de mecanismos de defesa




            http://cardiovasculogando.blogspo...
Funções do Sistema Cardiovascular
• Coagulação sanguínea




           http://cardiovasculogando.blogspot.com/
Componentes


• Coração
• Vasos sanguíneos
• sangue




                     http://www.sobiologia.com.br/conteudos/Fisio
...
http://pt.wikipedia.org/wiki/Ficheiro:Heart_te
e_four_chamber_view.jpg
Atividade Elétrica do Coração


• Células marca-passos: O estímulo para
  contração do músculo cardíaco é gerado pelas
  c...
Nó sinoatrial ou sinusal

           • região especial do coração,
             que controla a frequência
             car...
Sístole e Diástole
Eletrocardiograma - ECG
Controle Externo



         O sistema nervoso é conectado
         com o coração através de dois
         grupos diferent...
Simpático
• Os neurônios pós-ganglionares do sistema nervoso
  simpático secretam principalmente noradrenalina. A
  estimu...
Parassimpático
• O     neurotransmissor    secretado    pelos
  neurônios pós-ganglionares do sistema
  nervoso parassimpá...
Vasos Sanguíneos
• Artérias
• Veias
• capilares
Pressão Arterial
• Pressão arterial é a pressão exercida pelo
  sangue contra a parede das artérias.
• Em um adulto com bo...
Aferição da PA
Fisiologia Cardiovascular   Prof  Vagner Sá
Fisiologia Cardiovascular   Prof  Vagner Sá
Fisiologia Cardiovascular   Prof  Vagner Sá
Fisiologia Cardiovascular   Prof  Vagner Sá
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Fisiologia Cardiovascular Prof Vagner Sá

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Fisiologia Cardiovascular Prof Vagner Sá

  1. 1. Fisiologia Cardiovascular Prof. Vagner Sá UCB-RJ
  2. 2. Introdução • O sistema cardiovascular é constituído por uma rede de vasos sanguíneos de vários tipos e calibres, que põem em comunicação todas as partes do corpo. • Dentro desses vasos circula o sangue, impulsionado pelas contrações rítmicas do coração.
  3. 3. Funções do Sistema Cardiovascular • Transporte de gases http://cardiovasculogando.blogspot.com/
  4. 4. Funções do Sistema Cardiovascular • Transporte de nutrientes http://cardiovasculogando.blogspot.com/
  5. 5. Funções do Sistema Cardiovascular • Transporte de resíduos e metabólicos http://cardiovasculogando.blogspot.com/
  6. 6. Funções do Sistema Cardiovascular • Transporte de hormônios http://www.brasilescola.com/biologia/sistema-circulatorio.htm
  7. 7. Funções do Sistema Cardiovascular • Intercâmbio de Materiais http://cardiovasculogando.blogspot.com/
  8. 8. Funções do Sistema Cardiovascular • Transporte de calor http://nossoquintal.org/2008/01/08/calor-humano/calor/
  9. 9. Funções do Sistema Cardiovascular • Distribuição de mecanismos de defesa http://cardiovasculogando.blogspot.com/
  10. 10. Funções do Sistema Cardiovascular • Coagulação sanguínea http://cardiovasculogando.blogspot.com/
  11. 11. Componentes • Coração • Vasos sanguíneos • sangue http://www.sobiologia.com.br/conteudos/Fisio logiaAnimal/circulacao3.php
  12. 12. http://pt.wikipedia.org/wiki/Ficheiro:Heart_te e_four_chamber_view.jpg
  13. 13. Atividade Elétrica do Coração • Células marca-passos: O estímulo para contração do músculo cardíaco é gerado pelas células marca-passos, ou seja, independe do suprimento nervoso.
  14. 14. Nó sinoatrial ou sinusal • região especial do coração, que controla a frequência cardíaca. • Localiza-se perto da junção entre o átrio direito e a veia cava superior. • É constituído por um aglomerado de células musculares modificadas – as células marca-passos.
  15. 15. Sístole e Diástole
  16. 16. Eletrocardiograma - ECG
  17. 17. Controle Externo O sistema nervoso é conectado com o coração através de dois grupos diferentes de nervos, o sistema nervoso autônomo parassimpático e simpático.
  18. 18. Simpático • Os neurônios pós-ganglionares do sistema nervoso simpático secretam principalmente noradrenalina. A estimulação simpática do cérebro também promove a secreção de adrenalina pelas glândulas adrenais ou suprarrenais. • A adrenalina é responsável pela taquicardia (batimento cardíaco acelerado), aumento da pressão arterial e da frequência respiratória, aumento da secreção do suor, da glicose sanguínea e da atividade mental, além da constrição dos vasos sanguíneos da pele.
  19. 19. Parassimpático • O neurotransmissor secretado pelos neurônios pós-ganglionares do sistema nervoso parassimpático é a acetilcolina. Dessa forma, a estimulação parassimpática do cérebro promove bradicardia (redução dos batimentos cardíacos), diminuição da pressão arterial e da frequência respiratória, relaxamento muscular e outros efeitos antagônicos aos da adrenalina.
  20. 20. Vasos Sanguíneos • Artérias • Veias • capilares
  21. 21. Pressão Arterial • Pressão arterial é a pressão exercida pelo sangue contra a parede das artérias. • Em um adulto com boa saúde, a pressão nas artérias durante a sístole ventricular – pressão sistólica ou máxima – é da ordem de 120 mmHg (milímetros de mercúrio). • Durante a diástole, a pressão diminui, caindo em torno de 80 mmHg. Essa é a pressão diastólica ou mínima.
  22. 22. Aferição da PA

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