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 Biologicalsystem 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.

BronchiolesBranches 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.