PPT is about human respiratory system and breathing process

1. Chapter 2A

2.  Understand how the rate of diffusion is dependent on
surface area : volume ratio, thickness of the exchange
surfaces and difference in concentration, and can be
calculated using Fick’s law of diffusion.
 Understand how the structure of the mammalian lung
is adapted for rapid gas exchange.

3.  There is a continual conflict between the need for
oxygen and the need for water for organisms which live
on land.
 The conditions that favour the diffusion of oxygen into
an organism also favour the diffusion of water out of
that organism.

7.  Nasal cavity
 Mouth
 Epiglottis
 Larynx
 Trachea
 Incomplete cartilage rings
 Bronchi
 Bronchioles
 Alveoli
 Ribs
 Intercostal muscles
 Pleural membranes
 Pleural cavity
 Diaphragm

11.  Number of alveoli: 480-500 million alveoli
 Surface area: 40-75 𝑚2