Azygos system 2
Share your inquiries now with community members
Click Here
Sign up Now
Lessons List | 100
Lesson
Show More
Lessons
Comments
Our New Certified Courses Will Reach You in Our Telegram Channel
Join Our Telegram Channels to Get Best Free Courses
Join Now
We Appreciate Your Feedback
7 Reviews
Vasco Sar
HEMANT KUMAR MAURYA
Lydia
DIPESH KUMAR SINGH 2014843
Show More Reviews
Related Courses in Medical
Course Description
The respiratory system (also respiratory apparatus, ventilatory system) is a biological system consisting of specific organs and structures used for gas exchange in animals and plants. The anatomy and physiology that make this happen varies greatly, depending on the size of the organism, the environment in which it lives and its evolutionary history. In land animals the respiratory surface is internalized as linings of the lungs. Gas exchange in the lungs occurs in millions of small air sacs; in mammals and reptiles these are called alveoli, and in birds they are known as atria. These microscopic air sacs have a very rich blood supply, thus bringing the air into close contact with the blood. These air sacs communicate with the external environment via a system of airways, or hollow tubes, of which the largest is the trachea, which branches in the middle of the chest into the two main bronchi. These enter the lungs where they branch into progressively narrower secondary and tertiary bronchi that branch into numerous smaller tubes, the bronchioles. In birds the bronchioles are termed parabronchi. It is the bronchioles, or parabronchi that generally open into the microscopic alveoli in mammals and atria in birds. Air has to be pumped from the environment into the alveoli or atria by the process of breathing which involves the muscles of respiration.
In most fish, and a number of other aquatic animals (both vertebrates and invertebrates) the respiratory system consists of gills, which are either partially or completely external organs, bathed in the watery environment. This water flows over the gills by a variety of active or passive means. Gas exchange takes place in the gills which consist of thin or very flat filaments and lammelae which expose a very large surface area of highly vascularized tissue to the water.
Other animals, such as insects, have respiratory systems with very simple anatomical features, and in amphibians even the skin plays a vital role in gas exchange. Plants also have respiratory systems but the directionality of gas exchange can be opposite to that in animals. The respiratory system in plants includes anatomical features such as stomata, that are found in various parts of the plant.
Trends
Learning English Speaking
English greetings and responses
Video editing with adobe premiere
Python programming language
French
Mobile Apps from Scratch
Create a website with wordPress for beginners
MS Excel
Electrical transformers types for beginners
Magento Formation Français
Basic Structure of a Java Program
Communication Skills
PN Junction in Electronic Devices
programmation Java
AUTOMATA THEORY
Influencer marketing strategies for beginners
Data Science with Python conditions
Passive Income
Business Law fundamentals
My SQL
Recent
Creating monthly budget application in excel
Printing student ID cards with excel tools
Building mobile apps with excel sheets
Create a mobile app from an excel
Create drag and drop task scheduler In excel
Creating a project manager in excel
Creating school ID cards in excel
Creating automated excel Forms
ChatGPT tools for excel
Create contact scheduler application in excel
Creating meeting scheduler in excel
Excel for unlimited Labels
Creating Professional emails in excel with AI
Designing Point of sale application in excel
Building a retirement Planner in excel
Create complete employee Payroll In excel
Contact scheduler application in excel
Travel managing application in excel
Create Cafe manager application In excel
Excel for managing file attachments