How does the respiratory system work BBC Bitesize?

The diaphragm (a muscle under the lungs) moves down. This makes more space for the lungs which fill up with air from the mouth and nose. The air moves through tubes in the lungs to tiny air sacs called alveoli. Oxygen passes from these into the blood, which carries the oxygen to all the cells in the body.

What is the respiratory system made up of BBC Bitesize?

Passage of air into the lungs The trachea divides into two bronchi. One bronchus enters each lung. Each bronchus branches out into smaller tubes called bronchioles. Air travels through these bronchioles.

What is the structure of the respiratory system?

There are 3 major parts of the respiratory system: the airway, the lungs, and the muscles of respiration. The airway, which includes the nose, mouth, pharynx, larynx, trachea, bronchi, and bronchioles, carries air between the lungs and the body’s exterior.

What is the respiratory system GCSE PE?

The Respiratory System is everything we use to breathe and supply our bodies with oxygen. We breath air into our lungs. Oxygen is then transported around our body by our blood. The bronchioles end up at small bags called the alveoli, where gaseous exchange takes place.

What is respiration BBC Bitesize ks3?

Respiration is a chemical reaction which occurs in all living cells, releasing energy from glucose. Aerobic respiration occurs with oxygen and releases more energy but more slowly. Anaerobic respiration occurs without oxygen and releases less energy but more quickly.

What are the structures of the respiratory system and their functions?

Pharynx (throat): Tube that delivers air from your mouth and nose to the trachea (windpipe). Trachea: Passage connecting your throat and lungs. Bronchial tubes: Tubes at the bottom of your windpipe that connect into each lung. Lungs: Two organs that remove oxygen from the air and pass it into your blood.

How do fishes get air?

Fish take water into their mouth, passing the gills just behind its head on each side. Dissolved oxygen is absorbed from—and carbon dioxide released to—the water, which is then dispelled. The gills are fairly large, with thousands of small blood vessels, which maximizes the amount of oxygen extracted.

Why do men breathe faster when running?

When you exercise and your muscles work harder, your body uses more oxygen and produces more carbon dioxide. To cope with this extra demand, your breathing has to increase from about 15 times a minute (12 litres of air) when you are resting, up to about 40–60 times a minute (100 litres of air) during exercise.

How does the respiratory system work ks2?

During the process of respiration, oxygen is taken in through the nose and/or mouth and then transported to the tissue cells via the bloodstream. A chemical reaction involving oxygen takes place inside the cells. Through this reaction, energy, carbon dioxide, and water are produced.

What is the process of respiration?

“Respiration is defined as a metabolic process wherein, the living cells of an organism obtains energy (in the form of ATP) by taking in oxygen and liberating carbon dioxide from the oxidation of complex organic substances.”

What is the function of the respiratory system?

Your lungs are part of the respiratory system, a group of organs and tissues that work together to help you breathe. The respiratory system’s main job is to move fresh air into your body while removing waste gases.