(INSECTS) RESP SYS...

• What is the respiratory system of insects composed of?

  The respiratory system of insects is composed of a tracheal system.

  
• What are the air tubes in the tracheal system called?


  The air tubes in the tracheal system are called tracheae.
• What do tracheae branch into?

  Tracheae branch into finer tubes called tracheoles.
• What is the function of tracheoles in the insect respiratory system?

  Tracheoles allow for gas exchange in insects.
• How does the structure of tracheoles facilitate gas exchange?

  The wall of tracheoles is thin and permeable to allow gases to diffuse quickly.
• What do some insects have in their tracheal system to assist with gas delivery?

  Some insects have air sacs in their tracheal system.
• What is the mechanism of respiration in insects during inhalation and exhalation?

  • When insects inhale:
  • Abdominal muscles contract
  • Volume of abdomen increases
  • Air pressure in the tracheae decreases
  • Air enters the trachea

  
  

  • When insects exhale:
  • Abdominal muscles relax
  • Volume of abdomen decreases
  • Air pressure in the tracheae increases
  • Air exits the trachea

  
• How does the contraction of abdominal muscles affect air pressure in the tracheae during inhalation?

  The contraction of abdominal muscles increases the volume of the abdomen, which decreases air pressure in the tracheae.

  
• What happens to the volume of the abdomen during exhalation in insects?

  The volume of the abdomen decreases during exhalation.
• What is the relationship between abdominal muscle movement and air pressure in the tracheae during respiration?

  Abdominal muscle movement alters the volume of the abdomen, which in turn affects the air pressure in the tracheae.