How can our lungs continuously supply …

CBSE, JEE, NEET, CUET

Question Bank, Mock Tests, Exam Papers

NCERT Solutions, Sample Papers, Notes, Videos

Install Now

How can our lungs continuously supply clean atmospheric air?

Posted by Shubham Chaudhary 4 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Gaurav Seth 4 years, 11 months ago

Lungs are located in the chest cavity and separated from stomach and other parts of digestive system by a diaphragm. During breathing, intercostal muscles of ribs contract and relax which causes change in the volume of thorax.

During inhalation rib cage is raised and diaphragm lowers as intercostal muscles contract while during exhalation rib cage is lowered, diaphragm moves up, as intercostal muscles relax.

To ensure that clean atmospheric air is taken in during inhalation, there are hairs in nose which filter the air, trapping dirt in the mucus secreted from the epithelial lining.

In addition, epithelium in trachea also consists of ciliated cells. Cilia continuously beat upward to sweep the mucus from throat to the pharynx. Special goblet cells secrete mucus to trap the dirt from the inhaled air.

Cilia sweep it upward and it is swallowed from the pharynx into the adjacent oesophagus. Hence, the air entering lungs is free from dirt particles.

0Thank You

Saranya Sahoo 4 years, 11 months ago

Revise ur question

0Thank You

ANSWER

Test

Related Questions

How do organisms obtain their nutrition?

Posted by Rani Alan 1 year, 5 months ago

CBSE > Class 10 > Science

1 answers

Obtain the relation between incidence angle, emergence angle, prism angle and deviation angle for refraction through prism How to derive this

Posted by Ankita Yenteth 1 year, 5 months ago

CBSE > Class 10 > Science

0 answers

What is the function of petal and sepal.

Posted by Surya Kumar 1 year, 5 months ago

CBSE > Class 10 > Science

1 answers

This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

Few rules to keep homework help section safe, clean and informative.

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

Posted by Pandey Ji 6 months, 1 week ago

CBSE > Class 10 > Science