facts about the respiratory system

Published on 5th December 2016

THE RESPIRATORY SYSTEM

RESPIRATION

•             Uptake of oxygen by all cells for energy production

•             Formation of carbon dioxide and water as waste products

•             Exchange of these gases occurs between:

o             the alveoli of lungs and blood capillaries – external respiration

o             blood capillaries and all cell walls – internal respiration

 

ANATOMY

•             Nasal passages

•             Pharynx

•             Larynx

•             Trachea

•             Bronchi

•             Bronchioles

•             Alveoli

•             Pleura

•             Diaphragm

•             Thoracic cavity

 

GASEOUS EXCHANGE

•             Occurs due to diffusion = Transfer of gases from area of high to low pressure/concentration

•             O2 moves out of alveoli in to blood capillaries

•             CO2 moves in opposite direction

 

BREATHING

Inspiration

•             Intercostal muscles contract. Ribs move up and out

•             Diaphragm contracts and flattens. Lungs pulled downwards

•             Chest Cavity enlarges – so pressure inside chest is lowered and air is sucked in

Expiration

•             Intercostal muscles and diaphragm relax

•             Chest cavity decreases in size – so pressure inside chest is increased and air is forced out

Control

•             Normal rate about 16 x minute

•             Controlled by chemo receptors in aorta and carotid arteries which monitor levels of gases in blood and send information back to brain

•             Amount of lung expansion and muscle activity are also monitored by the brain

 

nose / nasal cavity           Warms , moistens and filters air as it is inhaled

pharynx               Passageway for air, leads to the trachea

larynx    The vocal cords are located here

trachea Tube from pharynx to bronchi. Rings of cartilage provide structure

bronchi Two branches at the end of trachea

bronchioles        A network of small branches leading from bronchi into lung tissue

alveoli   Functional units in lungs where gases are exchanged

pleura   Serous membrane covering lungs and

attached to ribcage and diaphragm

diaphragm          Muscle which helps in breathing

 

View all messages

Free Trial

No Commitment.
No hidden fees.
No credit card required.

Start Today

Testimonials

"I think your system is fantastic, and is so much easier than being in class, mainly because it's possible to pause, take your time, and re watch. I find the tutor extremely engaging, more so than just reading typed words on a page. The system that I have watched has helped me recognise areas of weakness, and affirm areas of knowledge."

- Carrie Mitchell -

Newsletter Signup

CAPTCHA
Anatomy & physiology courses online - refund policy

Accreditations


ITEC Level 3 certificate in Anatomy, Physiology and Pathology
brcp-dark-background.png
Association-Systematic-Kinesiology.png
BowenTrainingUK-logo.png

Get in Touch


GM Tree Training Ltd
5 Clumber Drive
Frome
Somerset BA11 2LG
United Kingdom
T: +44 (0)203 553 1060

Contact us

Secure transactions


Powered by WordPay

Mastercard Visa American Express Maestro JCB

This website uses cookies in order to help provide the best experience for our users. Find out more.

OK, I'm good with that