Your respiratory system is responsible for bringing oxygen into your body and removing carbon dioxide. From your nose and airways to your lungs and diaphragm, each part plays an important role in the process of breathing.

Every time you inhale, air travels through a network of passages before reaching tiny air sacs in your lungs called alveoli. Here, oxygen passes into the bloodstream while carbon dioxide moves in the opposite direction, ready to be breathed out.

Your respiratory system works closely with your circulatory system to transport oxygen throughout the body. Breathing also involves the coordinated movement of muscles, including the diaphragm and those between your ribs.

Understanding how your respiratory system works can help you appreciate the importance of air quality, physical activity and everyday respiratory hygiene.

In this guide, we'll explore the respiratory system, explain why it matters and share five practical lifestyle habits. You'll also find further reading from our Health Hub and information about Fenugreek & Fennel Combination, our featured Key System Product for the Respiratory System.

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Understanding Your Respiratory System

Your respiratory system is a network of organs and structures that work together to bring oxygen into your body and remove carbon dioxide. It includes your nose, mouth, throat, windpipe, airways, lungs and the muscles involved in breathing.

The respiratory system is divided into two main areas. The upper respiratory tract includes the nose, nasal cavity and throat, which help filter, warm and moisten incoming air. The lower respiratory tract includes the windpipe, bronchi, bronchioles and lungs, where air travels towards the tiny air sacs responsible for gas exchange.

Your lungs sit within your chest, protected by your ribcage. The right lung has three lobes, while the left has two, leaving space for your heart. Beneath the lungs sits the diaphragm, a dome-shaped muscle that plays a central role in breathing.

The respiratory system also has natural protective mechanisms. Mucus helps trap inhaled particles, while tiny hair-like structures called cilia move mucus and trapped material towards the throat, where it can be swallowed or expelled.

Together, these structures allow the respiratory system to carry out the continuous process of breathing while helping protect the delicate tissues within your lungs.

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How Does Your Respiratory System Work?

Breathing involves two main processes: inhalation, when air enters the lungs, and exhalation, when air leaves the body. These movements happen automatically throughout the day, although you can also consciously change the pace and depth of your breathing.

When you inhale, your diaphragm contracts and moves downwards while the muscles between your ribs help expand your chest. This increases the space inside your chest cavity, allowing air to flow into your lungs.

Air travels through the nose or mouth, down the windpipe and into two main airways called bronchi. These divide into progressively smaller passages known as bronchioles, which lead to millions of tiny air sacs called alveoli.

The alveoli are surrounded by very small blood vessels called capillaries. Oxygen passes from the air inside the alveoli into the bloodstream, while carbon dioxide moves from the blood into the alveoli to be breathed out.

When you exhale, the diaphragm relaxes and moves upwards, reducing the space within your chest and helping push air out of your lungs.

Your brainstem automatically adjusts your breathing rate in response to signals from the body, particularly changes in carbon dioxide levels. This allows your breathing to adapt naturally during activities such as exercise, sleep and rest.

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Why Your Respiratory System Matters

Your respiratory system is essential for supplying the oxygen your cells need to release energy from food. It also removes carbon dioxide, a waste product produced during normal cellular activity.

Breathing is closely connected to your circulatory system. Once oxygen enters the bloodstream through the lungs, your heart pumps oxygen-rich blood around the body. Carbon dioxide is then transported back to the lungs for removal during exhalation.

Your respiratory system also contributes to maintaining the body's normal acid-base balance. By adjusting the amount of carbon dioxide removed through breathing, it helps regulate the acidity of your blood.

Beyond gas exchange, your respiratory system plays a role in speaking and recognising smells. Air passing through the voice box allows sound production, while specialised receptors in the nose detect different odours.

Your breathing naturally changes throughout the day. Physical activity increases the body's demand for oxygen, while periods of rest generally require a slower breathing rate. These adjustments happen continuously without conscious effort.

Understanding these everyday functions highlights why avoiding tobacco smoke, maintaining good indoor air quality and keeping physically active are important considerations for respiratory wellbeing.

5 Everyday Habits for Respiratory Wellbeing

From maintaining good indoor air quality and avoiding tobacco smoke to understanding outdoor pollution and everyday respiratory hygiene, explore five practical habits to consider as part of a healthy lifestyle.

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    Make Your Home Air-Friendly

    Keep indoor spaces well ventilated by opening windows when outdoor air quality allows, using extractor fans and managing excess moisture. Regular cleaning and choosing low-fragrance household products can also help reduce exposure to indoor airborne irritants.

  • Three people are seated at a wooden outdoor table with mugs, plants, and a blurred patio background. The central woman is smiling and looking toward the man on the right, while the man on the left is partially visible and the woman on the left holds a mug.

    Avoid Tobacco Smoke and Vaping

    Avoid smoking, vaping and exposure to second-hand smoke wherever possible. Tobacco smoke contains substances that can damage the lungs and airways, while vaping is not risk-free. If you smoke, NHS stop-smoking services can provide practical advice and support to help you quit.

  • A woman wearing a black and white bicycle helmet rides a bike on a sunny outdoor path next to a river, with a man riding behind her.

    Be Aware of Outdoor Air Quality

    Check local air quality information, particularly during periods of high pollution or pollen. Consider quieter routes away from busy roads when walking or cycling, and adapt strenuous outdoor activities when pollution levels are high, especially if you are sensitive to airborne irritants.

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    Practise Everyday Respiratory Hygiene

    Wash your hands regularly, cover coughs and sneezes with a tissue or your elbow, and dispose of used tissues promptly. Keeping frequently touched surfaces clean and allowing fresh air into shared indoor spaces are sensible everyday habits, particularly during colder months.

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    Explore Gentle Breathing Exercises

    Take a few moments to notice your natural breathing pattern and explore comfortable, gentle breathing exercises. Activities such as yoga or guided breathing can provide an opportunity to slow down and focus your attention. Avoid forcing deep breaths or continuing any exercise that causes discomfort.

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Nature’s Sunshine Fenugreek & Fennel Combination supplement bottle, labelled food supplement, 100 capsules.

Meet Fenugreek & Fennel, Your Key System Product

Alongside everyday lifestyle habits, you may wish to learn more about Fenugreek & Fennel Combination, our featured Key System Product for the Respiratory System.

Fenugreek & Fennel Combination is a traditional herbal food supplement from Nature's Sunshine, bringing together two well-known botanical ingredients in a convenient capsule format.

Fenugreek (Trigonella foenum-graecum) is a plant whose seeds have a long history of culinary and traditional herbal use. Fennel (Foeniculum vulgare) is an aromatic plant recognised for its distinctive flavour and widespread use in food and herbal preparations.

This botanical combination offers an option for those interested in incorporating traditional plant ingredients into their daily nutritional routine. You can explore the full ingredients, nutritional information and directions for use on the product page.

Designed to complement a varied, balanced diet and healthy lifestyle, Fenugreek & Fennel Combination can be considered alongside the everyday respiratory wellbeing habits discussed in this guide.

PLEASE NOTE: NOT SUITABLE FOR VEGANS

This Key Body System Product is not suitable for a plant-based diet. Shop suitable alternatives such as Multi-Vits and Minerals or Breathe & Ease Aromatherapy Blend.

OUR ASSURANCE TO YOU

We want you to feel confident when shopping with Lily & Loaf. That's why eligible first purchases are covered by our 90-day money-back guarantee, giving you added peace of mind when trying something new. Terms and conditions apply.

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Respiratory System