How are the lungs designed in human beings to maximise the area for exchange of gases.?

Question

Answer

Within the lungs, the air passage divides into smaller and smaller tubes which finally terminate in balloon like structures called alveoli. The alveoli provide a surface where the exchange of gases can take place. The 2 lungs together have about 300-500 million alveoli. The walls of the alveoli are supplied with an extensive network of blood vessels. So lungs maximise the area for gaseous exchange through the presence of large number of alveoli which are richly supplied with blood.

Answer

Within the lungs , the air passage divides into smaller and smaller tubes which finally terminate in ballon like structure called alveoli..... so lungs maximise the area
for gaseous exchange through the presence of the large number of alveoli which are richly supplied with blood.....!!!

Answer

The lungs in human beings are designed to maximise the area for exchange of gases through various anatomical features. Let's take a closer look at them:

Alveoli
The lungs are made up of millions of tiny air sacs called alveoli, which are the sites of gas exchange. These sacs are lined with a thin layer of cells, called the epithelium, that allows for the diffusion of gases across the membrane.

Surface Area
The surface area of the lungs is maximised by the presence of numerous alveoli that increase the contact area between air and blood. The total surface area of the lungs is estimated to be around 70 square meters, which is roughly equal to the size of a tennis court.

Capillary Network
The walls of the alveoli are surrounded by a dense network of capillaries, which carry deoxygenated blood from the heart to the lungs. The close proximity of these blood vessels to the alveoli ensures that oxygen and carbon dioxide can easily diffuse across the membrane.

Diaphragm
The diaphragm is a large, dome-shaped muscle that separates the chest cavity from the abdominal cavity. It plays a crucial role in breathing by contracting and relaxing to change the volume of the chest cavity, which in turn causes air to flow in and out of the lungs.

Mucus and Cilia
The airways leading to the alveoli are lined with a layer of mucus that traps foreign particles and prevents them from entering the lungs. Tiny hair-like structures called cilia then move the mucus upwards towards the throat where it can be coughed out or swallowed.

In conclusion, the lungs in human beings are designed to maximise the area for exchange of gases through the presence of millions of alveoli, a dense capillary network, a flexible diaphragm, and a protective layer of mucus and cilia. These features work together to ensure that oxygen is efficiently delivered to the body's tissues and carbon dioxide is removed from the body.

Similar Class 10 Doubts

How are lungs designed in human beings to maximise the the area for the exchange of gases?

How are the lungs designed in human beings to maximise the area for the exchange of gases??

How are the lungs designed in human being to maximise the area for exchange of gases?

How are the lungs designed in human beings to maximize the area for exchange of gases?

How are the lungs designed in human beings to maximize the area of exchangeing of gases?

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