Humans use their lungs to breathe. The process begins when we inhale air through our nostrils. From this point it gets to the lungs where the oxygen comes in contact with the surface of the lungs and subsequently to tiny units of the lungs called the alveoli. However to understand the process of breathing, it is a great idea to start with the human lungs diagram. This page features and interactive online worksheet version of the diagram of the human lungs to label. It is a game that features parts of the lungs scrambled to a corner. Students are required to drag and place the labels in the right positions. Keep practicing until you master this biology and anatomy skill. Students will love playing this game online. It is free and can be accessed at all times of the day. This exercise is for students in 1st, 2nd, 3rd, 4th, 5th, 6th and 7th grades.
The human lung is a vital organ located within the chest, responsible for the exchange of gases between the atmosphere and the bloodstream. The main function of the lung is to facilitate the process of respiration, in which oxygen from the air is inhaled into the body and carbon dioxide, a waste product, is exhaled out. The lungs are essential for the overall functioning of the body as they provide the oxygen needed for the cells to produce energy through the process of cellular respiration.
The human lung is divided into two main sections, the right lung and the left lung. The right lung is slightly larger than the left lung and has three lobes, while the left lung has only two lobes. The lobes are separated by fissures, which are deep grooves in the surface of the lung.
The process of respiration begins with the inhalation of air through the nose and mouth. The air is then carried down the trachea, or windpipe, which is a tube-like structure that extends from the larynx to the bronchi. The trachea is lined with tiny hair-like structures called cilia, which help to filter out dust and other particles from the air we breathe. At the bottom of the trachea, the air is divided into two main branches, known as the bronchi.
The bronchi are the two main tubes that carry air to the lungs. The right bronchus leads to the right lung, while the left bronchus leads to the left lung. The bronchi are lined with cartilage, which helps to keep them open and allows air to flow freely into the lungs.
As the bronchi branch off into smaller tubes, they become known as bronchioles. The bronchioles end in tiny air sacs called alveoli, which are the site of gas exchange in the lungs. The alveoli are lined with a thin layer of cells called the alveolar wall, which is rich in tiny blood vessels called capillaries.
Oxygen from the air we breathe diffuses through the alveolar wall and into the blood in the capillaries. At the same time, carbon dioxide, a waste product of cellular respiration, diffuses from the blood in the capillaries into the alveoli to be exhaled out of the body. This process of gas exchange is essential for the overall functioning of the body as it provides the cells with the oxygen they need to produce energy.
The lungs are also responsible for the regulation of blood pressure within the body. This is achieved through the action of the pulmonary arteries and veins, which carry blood to and from the lungs. The pulmonary arteries carry oxygen-depleted blood from the heart to the lungs, where it is oxygenated before it is returned to the heart to be pumped back out to the rest of the body. The pulmonary veins carry oxygenated blood from the lungs back to the heart.
In addition to the main structures of the lung, there are several other important parts of the respiratory system that play a role in the process of respiration. The diaphragm is a large, dome-shaped muscle that separates the chest cavity from the abdomen. It is the main muscle responsible for inhalation, as it contracts and moves downward during inspiration, increasing the volume of the chest cavity and drawing air into the lungs. The intercostal muscles are the muscles that lie between the ribs and play a role in both inhalation and exhalation.
Overall, the lung is a vital organ that plays a crucial role in the overall functioning of the body. Its main function is to facilitate the exchange of gases between the atmosphere and the bloodstream, providing the cells with the oxygen.