Human Lungs — Interactive Biology Presentation by Divyansh Agarwal, RNS Institute of Technology

LUNGS

Biology for Engineers — BBOE407

HUMAN LUNGS

BREATHE. EXCHANGE. SURVIVE.

NameDivyansh Agarwal
USN1RN24ME015
BranchMechanical Engineering
CollegeRNS Institute of Technology
SubjectBiology for Engineers (BFE)
YOU BREATHE 20,000 TIMES A DAY… BUT HAVE YOU EVER SEEN HOW?

Scroll to explore

Section 02 — Anatomy

A Journey
Inside.

  • 01
    Trachea
    The windpipe — 10–12 cm long, reinforced with cartilage rings
  • 02
    Bronchi
    Two main airways branching into each lung
  • 03
    Bronchioles
    Tiny tubes — over 30,000 in each lung
  • 04
    Alveoli
    300 million air sacs — site of gas exchange
  • 05
    Pleura
    Double-layered membrane lining each lung
TRACHEA BRONCHI BRONCHIOLES ALVEOLI PLEURA
ANATOMY

Section 02 — Interactive

Explore Every
Part.

Click any highlighted region to explore, or drag a part card onto the lung for a quiz-style check (tap a card, then a region on mobile).

drag or tap to place

01
Trachea
The windpipe — 10–12 cm reinforced with 16–20 C-shaped cartilage rings; connects larynx to bronchi
→
02
Bronchi
Two main airways branching at the carina; right bronchus is shorter, wider, and more vertical
→
03
Bronchioles
Over 30,000 per lung — tiny tubes < 1 mm diameter without cartilage; regulate airflow resistance
→
04
Alveoli
~300 million air sacs per lung; 70 m² surface area; O₂/CO₂ exchange in 0.3 seconds
→
05
Pleura
Double-layered serous membrane; negative intrapleural pressure keeps lungs expanded
→
06
Left Lung
2 lobes separated by oblique fissure; ~1.6 L volume; cardiac notch accommodates the heart
→
07
Right Lung
3 lobes (upper, middle, lower); ~2 L volume; horizontal + oblique fissures; 10 segments
→
Quiz Mode
Place the Parts

Drag each card into the correct lung region. On touch screens, tap a card to select it, then tap the highlighted area.

Pick a part to begin.
0 / 7 placed
Quiz tips
Match the airway parts first, then finish with the lungs and pleura.

Section 03 — Simulation

The Breathing System

O₂ IN
Inhale
CO₂ OUT
Exhale
INHALE
Scroll to breathe
Air enters trachea
Bronchi split the flow
O₂ reaches alveoli
CO₂ diffuses out
Exhale begins
OXYGEN enters through 300 million alveoli CARBON DIOXIDE expelled with every exhale
300M
Alveoli per lung
Surface area equal to a tennis court — 70 m²
20k
Breaths per day
That is 7–8 million breaths every single year
0.3s
Gas exchange time
O₂ and CO₂ swap across capillary walls in 0.3 seconds
EVERY BREATH KEEPS YOU ALIVE.
Divyansh Agarwal · 1RN24ME015 · BFE · BBOE407