what does each part of the constructed lung model represent brainly

Each main part of a simple “bottle + balloons + straw” lung model stands for a real structure in the respiratory system.

What each part represents

• Plastic bottle
  • Represents the chest cavity or ribcage that surrounds and protects the lungs and gives them space to expand.

• Balloons inside the bottle
  • Represent the lungs themselves, which fill with air during inhalation and empty during exhalation.

• Straw (or Y‑shaped straw/tube)
  • Represents the trachea (windpipe) and, if it splits, the bronchi that carry air from the mouth/nose into each lung.

• Balloon or plastic sheet at the bottom of the bottle
  • Represents the diaphragm , the muscle under the lungs that moves down and up to help draw air in and push it out.

• Tape/rubber bands/clay sealing the top
  • Represent the sealed thoracic cavity and pleural membranes that keep the system almost airtight so pressure can change and move air.

How it shows breathing (quick idea)

When you pull the bottom balloon or plastic sheet down (like the diaphragm contracting), the space in the bottle increases, pressure drops, and the inner balloons inflate (inhalation). Pushing it up decreases space, pressure rises, and the inner balloons deflate (exhalation).

Information gathered from public forums or data available on the internet and portrayed here.