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

Population growth, Increase in population size is known as population growt...

Increase in population size is known as population growth. It depends upon number of persons added to the population and number of persons lost from the population. Addition in pop

What are the sign of horner''s syndrome, What are the sign of Horner's synd...

What are the sign of Horner's syndrome? 1. Miosis, 2. ptosis, 3. enophthalmos, 4. anhidrosis and 5. heterochrome iridis.

What are some common laboratory techniques, What are some common laboratory...

What are some common laboratory techniques? During the course of these laboratory sessions, you will be usual to become proficient in the performance of the following laborator

Why a female frog has a genetic trait, A female frog has a genetic trait th...

A female frog has a genetic trait that stops it from producing eggs. How likely is it that this trait will spread by the frog population? Explain your answer. This trait will

The cerebrum, The cerebrum is clearly the most interesting part of the brai...

The cerebrum is clearly the most interesting part of the brain from the point of view of cognitive neuroscience. The cerebrum consists of highly symmetrical left and right hemisphe

Define meiosis, Give two examples in each case of organs or tissues in whic...

Give two examples in each case of organs or tissues in which you would expect  (a) meiosis,  (b) mitosis to be taking place   a) Meiosis is likely to

Explain about the complete proteins, Explain about the Complete proteins? ...

Explain about the Complete proteins? We now know that proteins are composed of amino acids and that proteins differ in their amino acid make-up. Proteins lacking in one or more

What is pancreas , What is Pancreas ? The pancreas lies in the abdomina...

What is Pancreas ? The pancreas lies in the abdominal cavity in a loop between the stomach and small intestine. The pancreas consists of two major types of cells: those produci

Measurement of nitrogenase activity, Measurement of Nitrogenase Activity ...

Measurement of Nitrogenase Activity There are various methods to find out whether an organism is a N 2 -fixer or not. If an organism can grow in normal atmosphere without any

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