AQA PHED 1 PE RESPIRATORY SYSTEM

HideShow resource information
  • Created by: mylie101
  • Created on: 13-05-16 20:26

Structure of the respiratory system.

  • NASAL CAVITY
  • PHARYNX
  • LARYNX
  • TRACHEA
  • BRONCHII
  • BRONCHIOLES
  • ALVEOLI
  • LUNG

THE MECHANICS OF BREATHING.

INSPIRATION (REST)

  • External intercostal muscles contract, causing the chest to move outwards and upwards.
  • Diaphram contracts, causing it to flatten.
  • The thorcacic cavity increases in size 
  • The pressure withing the lungs decrease.

INSPIRATION (EXERCISE)

  • Breathing rate and depth increases
  • Inspiration is aided by: sternocleidomastoid, pectoralis minor and scalenes.

EXPIRATION (REST)

  • External intercostal muscle relaxes, causing the chest to move inwards and downwards
  • The diaphram also relaxes, causing it to return to its dome shape
  • The thoracic cavity decreases in size
  • The lung pressure is now increased.

EXPIRATION (EXERCISE)

  • Aided by the intercostal muscles contracting, causing the ribs to move inwards and downwards quicker.
  • Also aided by the abdominal muscles.

LUNG VOLUMES AND CAPACITY.

  • TIDAL VOLUME: The volume of air that can be inspired and

Comments

No comments have yet been made

Similar Physical Education resources:

See all Physical Education resources »See all Anatomy & physiology resources »