Presentation Made By:- Mudit Singh Vats Sixth - A

IntroductionIntroduction

All the organisms are made up of cells. All the organisms are made up of cells. Group of cells make a tissue. Tissues Group of cells make a tissue. Tissues collectively form organs and organs, collectively form organs and organs, working together form an organ working together form an organ system. Human and animal bodies are system. Human and animal bodies are made up of many such organ systems made up of many such organ systems which carry out different functions.which carry out different functions.

This presentation is This presentation is about human about human

respiratory system, an respiratory system, an essential function of essential function of

human bodyhuman body

The Respiratory SystemThe Respiratory System Respiration is the Respiration is the

process in which oxygen process in which oxygen is taken in and carbon is taken in and carbon dioxide is released from dioxide is released from the body. Energy is also the body. Energy is also released which is released which is utilized to carry out utilized to carry out various living processes. various living processes. The respiratory system The respiratory system consists of the following consists of the following organs:- organs:-

The Nasal CavityThe Nasal Cavity

Air enters the nose Air enters the nose through two nostrils through two nostrils and reaches the nasal and reaches the nasal cavity. Here the air is cavity. Here the air is warmed and filtered. warmed and filtered. The hair present in The hair present in the nostrils stop the the nostrils stop the dust or germs from dust or germs from entering the human entering the human respiratory system.respiratory system.

Pharynx and LarynxPharynx and Larynx The nasal cavity leads The nasal cavity leads

into an organ called into an organ called pharynx. From the pharynx. From the pharynx, the air passes pharynx, the air passes into a chamber called into a chamber called larynx. The larynx larynx. The larynx produces sound and is produces sound and is also called the voice box. also called the voice box. The opening of pharynx The opening of pharynx into larynx is guarded by into larynx is guarded by a valve called epiglottis. a valve called epiglottis. This closes the opening This closes the opening while we swallow food while we swallow food and keeps it open during and keeps it open during breathing.breathing.

Wind PipeWind Pipe

The wind pipe is a The wind pipe is a delicate muscular delicate muscular tube situated in the tube situated in the front of oesophagus front of oesophagus or the wind pipe. It or the wind pipe. It is also called is also called trachea. It is 12 cm trachea. It is 12 cm in length and 2.5 in length and 2.5 cm in diameter. The cm in diameter. The wind pipe is divided wind pipe is divided into two parts called into two parts called Bronchi as it enters Bronchi as it enters the lungs.the lungs.

Bronchi and BronchiolesBronchi and Bronchioles

When a person takes in a When a person takes in a breath of air, the air travels breath of air, the air travels through the nose or mouth, through the nose or mouth, into the larynx, and then into into the larynx, and then into the trachea, which is the the trachea, which is the main passageway into the main passageway into the lungs. The trachea divides lungs. The trachea divides into a right and left main into a right and left main bronchus. Each major bronchus. Each major bronchus then subdivides bronchus then subdivides into smaller airway passages into smaller airway passages referred to as bronchi. As the referred to as bronchi. As the airway passages make their airway passages make their way out to the lung tissue, way out to the lung tissue, the passages become the passages become smaller and are referred to smaller and are referred to as bronchioles. as bronchioles.

Lungs Lungs

The bronchi leads The bronchi leads into the lungs which into the lungs which are situated on are situated on either side of the either side of the chest cavity. Lungs chest cavity. Lungs contain a number of contain a number of air sacks and blood air sacks and blood vessels.vessels.