Explain in detail about respiratory system, Biology

Assignment Help:

Explain in details about Respiratory system

Respiratory system starts from nostrils through which we inhale air in the nasal cavity. Then, air enters pharynx and goes through larynx to enter trachea which is also known as wind pipe. Larynx leads to trachea through a small opening known as glottis. Glottis is guarded by a leaf like structure known as epiglottis so that food particles cannot enter trachea while taking food. Larynx also functions as a voice box. It produces sound by the vibrations of its two vocal cords.

Trachea is a tubular structure having rings of soft bones, so it does not collapse. At middle of thorax, trachea divides into two right and left primary bronchus to enter right and left lungs. Two primary bronchi go on dividing into secondary, tertiary bronchi, bronchioles and terminal bronchioles. Terminal bronchiole again divides into alveolar ducts which ultimately enter air sacs known as alveoli. Terminal bronchiole, alveoli with their alveolar ducts is functional units of respiratory system.

Two lungs are covered by layers of covering known as pleura. And it contains a thin layer of fluid which prevents friction between lungs and thoracic wall. The thoracic cavity is separated from abdominal cavity by a muscular partition which is known as diaphragm. Diaphragm plays important role in respiration. Mechanical process of inspiration and expiration involves movements of diaphragm and ribs.

Respiration is an automatic act. The normal rate of respiration in adult is 14 to 18 breaths per minute. Respiration is regulated by respiratory centers present in medulla oblongata of the brain system

 


Related Discussions:- Explain in detail about respiratory system

What are differentiations of the cell membrane, What are differentiations o...

What are differentiations of the cell membrane? In some types of cells, the cell membrane presents differentiations that are essential for the specific functions of the cells.

What is the action mechanism of the antiretroviral drugs, What is the actio...

What is the action mechanism of the antiretroviral drugs called protease inhibitors which are used against HIV infection? Protease inhibitors are some of the antiretroviral dru

Explain clinical dietetics, Explain Clinical Dietetics Clinical Dietet...

Explain Clinical Dietetics Clinical Dietetics   is  the  application of dietetics  in  a  hospital  or Health care institutional  setting. Clinical dietetics focuses on an ind

Totipotency and pluripotency, Totipotency and Pluripotency In the sta...

Totipotency and Pluripotency In the starting we said that the fertilized egg cell (zygote) has the capacity or potentiality to give rise to all kinds of cell types, like a bl

Admission information - nursing, Admission Information   The physician ...

Admission Information   The physician and nurses are the primary source of facts concerning the purpose of therapeutic plan and expected outcome of hospitalization. The informa

Why physical fitness is tested, Why Physical Fitness is Tested? 1) To a...

Why Physical Fitness is Tested? 1) To assess pre-training fitness status: Before beginning an exercise programme and allow the exercise, intensity and duration to be set at th

Why soybean protein used as stabilized dispersions, Soybean protein used as...

Soybean protein used as stabilized dispersions Soybean protein concentrates have been used as stabilized dispersions in milk-like beverages and simulated dairy products, such a

Define the vital force hypothesis, How did Pasteur's experiment answer the ...

How did Pasteur's experiment answer the objections raised by supporters of the "vital force" hypothesis? Pasteur's experiment allowed air from the out- side to mix with air fro

Define protein stabilized food emulsions, Define Protein Stabilized Food Em...

Define Protein Stabilized Food Emulsions? Many food products are emulsions (eg. milk cream, ice creams, cream, butter etc.) and protein constituents often play a major role in

What happens within the cell in the third interface period, What are the ev...

What are the events that mark the beginning and the end of the third interphase period? What happens in the cell in this period? The third interphase period is the G2. It star

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd