Biology

• Chromatin - DNA + proteins that make up chromosomes
• The nucleus is the control center of the cell.
• Mitochondria produce energy through aerobic respiration.
• What are lymphocytes?


  Lymphocytes are white blood cells that help produce antibodies to attack invading cells
• what are phagocytes?


  Phagocytes eliminate the micro-organisms by digesting and engulfing them
• What is influenza?


   Flu is a contagious respiratory illness caused by influenza viruses that infect the nose, throat, and sometimes the lungs.
• How do you inhale?

  The diaphragm contracts and moves down expanding the chest cavity

  intercostal muscles help lift the ribs up and out expanding the chest cavity even more

  the air pressure drops in the lungs

  because of the pressure difference air flows in through the nose or mouth

  air travels to alveoli

  oxygen exchange