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 is cytogenetics, What is Cytogenetics? Before the advent of modern...

What is Cytogenetics? Before the advent of modern technology, the American biologists Thomas Hunt Morgan, G.W. Beadle, H. Sturtevant, Barbara McClintock, and others contributed

What are the plant hormones, What are the plant hormones? The Plant hor...

What are the plant hormones? The Plant hormones also called as phytohormones, are the substances that control the embryonic development and the growth of the adult plant.

The genetic code is a triplet code, In During translation, the series of an...

In During translation, the series of an mRNA molecule is examined from its 5' end by ribosomes that then synthesize an appropriate polypeptide. Together in prokaryotes and in eukar

Explain neurologic disease, Explain Neurologic disease For patients wit...

Explain Neurologic disease For patients with facial nerve palsy alone, oral doxycycline or amoxicillin may be effective. Patients with other neurologic involvement, such as men

Define effect on human placental lactogen in pregnancy, Define effect on Hu...

Define effect on Human placental lactogen in pregnancy? Human placental lactogen, with a structure similar to the growth hormone, increases throughout pregnancy. Its rate of pr

Give detail explanation of aerobic exercises, Aerobic Exercises, Examples a...

Aerobic Exercises, Examples and their Do's and Don'ts In the aerobic exercises it requires activities performed for a longer period here we do like to mention certain activitie

Explain microbiology of vegetables, Q. Explain Microbiology of vegetables? ...

Q. Explain Microbiology of vegetables? Ans. All of us are well aware that vegetables are grown in soil, which, we already know, are a rnajor support system for the mi

Pox diseases, Pox diseases Small-pox in human beings and pox in a few ...

Pox diseases Small-pox in human beings and pox in a few animal species are closely related to each other. It is shown by the fact that the vaccine for the prevention of small

Discontinuous variation in human populations, Give two examples in each cas...

Give two examples in each case of (a) continuous, (b) discontinuous variation in human populations.    a) Continuous variation: for example, weight, height, intelligence, ha

Alkoloids, what do you mean by alkoloids how are they usedin daily life wha...

what do you mean by alkoloids how are they usedin daily life what are the different types of alkoloids?

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