Respiratory & C. Q1 L1

• Respiratory system


  Also known as the human breathing system, responsible for taking in oxygen and expelling carbon dioxide
• Parts of the respiratory system

  • Nose and mouth
  • Nasal cavity or nasal passageways
  • Pharynx
  • Larynx
  • Trachea
  • Lungs
  • Bronchi
  • Bronchioles
  • Alveoli
• Inhalation


  1. Oxygen enters the body

  2. Ribs move out, chest space increases

  3. Diaphragm muscle contracts, moves down
• Exhalation


  1. Carbon dioxide exits the body

  2. Ribs move in, chest space decreases

  3. Diaphragm muscle relaxes, moves up
• Circulatory system


  Also known as the cardiovascular system, the life support structure that nourishes cells and delivers materials in the body
• Major parts of the circulatory system

  • Heart
  • Blood vessels (arteries, veins, capillaries)
  • Blood
• The heart is a hollow muscle as big as your fist
• Parts of the heart

  • Right atrium
  • Left atrium
  • Right ventricle
  • Left ventricle
  • Tricuspid valve
  • Bicuspid valve
  • Pulmonary valve
  • Aortic valve
  • Superior vena cava
  • Inferior vena cava
  • Pulmonary artery
  • Pulmonary vein
  • Aorta
• Circulatory system function


  Air enters lungs, goes to left side of heart, pumped through body, oxygen processed by cells, carbon dioxide returned to right side of heart, expelled through lungs
• Types of circulation


  • Pulmonary circulation
  • Coronary circulation
  • Systemic circulation
• The circulatory system functions with other body systems to deliver different materials and transport waste away from the body
• The bronchi are two tubes that branch off from the trachea into the lungs.
• The trachea is the windpipe, which connects to the larynx.
• Bronchial tree refers to the network of airways within the lungs.