Question

Draw a diagram of the human respiratory system and label – pharynx, trachea, lungs, diaphragm and alveolar sac on it.

Answer 1

Hint: The respiratory tract contains a set of tissues and organs engaged in the intake of oxygen from the air and the emission of carbon dioxide emitted during aerobic cellular respiration. Such gas exchange is often named breathing or external respiration.

Complete answer:
Respiration begins when we breathe in air from the nose or mouth. It passes down to the back of our throat between pharynx and trachea and into the windpipe, which is fragmented through airways labelled bronchial tubes. Such airways have to be accessible to one’s lungs to serve its optimum. It ought to be free from inflammation or discomfort and excess mucus. The bronchial tubes move into your lungs, they are split into various air passages called bronchioles. Then bronchioles wind up in tiny balloon-like airbags termed alveoli. The cells are surrounded by a mesh of small blood vessels capillaries. Thus, oxygen from ingested air passes into the blood. Ingestion and excretion are just how the body absorbs oxygen and eliminates carbon dioxide. The procedure is aided by a large dome-shaped muscle underneath the lungs called the diaphragm. When we breathe in, the diaphragm pulls down, making a vacuum that forces air to escape through the lungs. The nasal plays a crucial role in breathing, but the olfactory impulses and their surrounding structures are also implicated in the ability to smell. In addition, a few of the epithelial cells further secrete mucus to trap larger particulate matter present in the air we breathe.

Note: Gaseous exchange seems to be the primary role of the respiratory tract. Human cells use oxygen and emit carbon dioxide as a by-product. Humans do not need only a way to get more oxygen into the cells, but they often need a way to alleviate carbon dioxide. An animal's lungs or gills expel carbon dioxide while supplying oxygenated blood.