Respiratory System

By: Shruti Asodaria, Tanya Raghu, and Palak Kapoor

Respiratory System

We need a constant supply of oxygen to survive. The respiratory systems duty is to let us obtain oxygen and excrete wastes. The system also allows us to speak and make other noises. The main organs in the Respiration system are the diaphragm, rib cage, and chest muscles. The ribs protect the lungs from injuries, the lungs expand and contract while inhaling and exhaling.


Lungs are inside the chest, protected by the rib cage. The lungs are surrounded by lubricants, allowing them to move freely. This fluid reduces friction between the lungs, allowing them to slide easily over each other, when we breathe. The right lung has 3 lobes, and the lift lung is slightly smaller , because it has a small space for the heart. The lungs are joined by an area called the Hilus or Root, this is where major blood vessels and nerves exit and enter the lungs.

Blood Supply to the lungs

The circulation of blood from the lungs to the heart is a seperate loop from the rest of the body. The heart pumps deoxegenated blood to the lungs and the blood flows back to the heart. The blood is removed from the veins.

Lung diseases

Pleurisy: It is cause usually by microoragnisms that may enter the body through the airways though normal breathing.

Pneumonia: It is a inflamation of the narrowest airway of the lungs. Fluid builds up in airways, preventing the lungs from functioning correctly.

Tuberculosis: It is caused by infection from microoragnisms, the organisms damage tissue, making holes in the lungs which cannot be repaired.

Cystic Fibrosis: It is an inherited disease that effects lungs and other organs. The lungs make mucus that doesnt go away easily as it builds up it blocks the airways, this makes it difficut to breathe. Antibiotics helps prevent mucus build up.