SREE NARAYANA
TRAINING COLLEGE
SREEKANDESWARAM
Submitted by. Vani Chandran
Natural Science
Reg.No.13383019
Submitted on.
Submitted to Soya .P

Introduction
The respiratory system is a Biological
system consisting of specific organs and structures
used for the process of respiration in an organism.
The respiratory system is involved in the intake
and exchange of oxygen and carbon dioxide between
an organism and the environment.

RESPIRATORY SYSTEM

Parts of Respiratory System
 Nostrils
 The openings through which air enters the body.
The minute hairs and mucus in the nostrils prevents
the entry of dust and harmful germs into the lungs.

Nasal Cavity
 The chamber following the nostrils. It opens to
pharynx.

Epiglottis
The oesophagus and trachea started at the
pharynx. So there is a chance for food to enter the
trachea. It is the epiglottis that prevents.

Trachea
Starts at the pharynx . It is made up of
complete ring of cartilage. There are cilia and mucus
in this.

Bronchi
Two branches of trachea. Each opens into a lung on
each side.
Lungs
Two lungs . Found on either side of the heart in
thoracic cavity

Pleura
Double membrane covering the lung.
There is a fluid between these
membranes. The fluid reduces
friction when the lungs contract and
relax.
Bronchioles
Branches of the bronchi. Carry air
into the alveoli

Alveoli
 Each bronchiole ends in a group of alveoli. The lung is made up of alveoli. There are
blood capillaries covering the alveoli. Exchange of gases takes place at the alveoli.