Upper airway function and dysfunction in respiration. . The upper airway not only provides a passage for air to be breathed in and out of the lungs, but it also heats, humidifies and filters the air and is involved in cough, swallowing and speech.. Upper respiratory tract This includes the nose, mouth, and the beginning of the trachea the section that takes air in and lets it out . Lower respiratory tract This includes the trachea, the bronchi, broncheoli and the lungs the act of breathing takes place in this part of the system ..Overview of the Respiratory System and Lung and Airway Disorders Learn about from the Merck Manuals Medical Consumer Version. How Lungs Function..
Have you ever wondered why learning about human body anatomy organs can feel overwhelming? Maybe you're a med student staring at a 500-page anatomy textbook, or you're simply curious about how your body works but don’t know where to start. Let’s get real — understanding the human body’s organ systems doesn’t have to be complicated. You just need the right tools, resources, and a little guidance. And if you want to learn efficiently, I’ve got the perfect lineup for you. Ready? The Human Body Organ Systems: A Quick Breakdown The human body is a complex machine made up of interconnected organ systems . Each system has a job, but all work together to keep you alive and healthy. Let’s break it down in the simplest way possible. Circulatory System : Pumps blood through your body. This includes your heart , veins , and arteries . Digestive System : Breaks down the food you eat and absorbs nutrients. Think stomach , liver , and intestines .