respiratory system

Question 1

function of respiratory system

Answer 1

to provide an extensive surface area for gas exchange between air and blood by inhaling and exhaling
- Produce sounds and ability to smell

Question 2

path of air

Answer 2

1. Nose/nasal cavity - warms + moistens + filters air with mucus and nasal hairs
2. Pharynx - passageway for food and air
3. Larynx - where vocal cords are
4. Trachea - connects larynx to bronchi and brings air to and from lungs for respiration
   
   • Epiglottis - prevents food from entering trachea
5. Lungs - protect heart and surround bronchioles and alveoli, providing space for gas exchange
   
   • Bronchi → Bronchioles - deliver oxygen to the lungs
   • Alveoli - where gas exchange of oxygen and CO2 take place because of the direct contact with capillaries
     
     • Oxygen diffuse through walls of alveoli and into red blood cells
     • Large surface area covered in capillaries show that alveoli are well adapted for

Question 3

diaphram

Answer 3

muscle that aids in breathing by contracting and moving rib cage up and down