Chapter 15: Breathing and Exchange of Gases – Part 1
🌬️ Chapter 15: Breathing and Exchange of Gases – Part 1 🫁 Introduction Every cell in our body needs oxygen to carry out cellular respiration , and it produces carbon dioxide as a waste. The process by which oxygen is taken in and carbon dioxide is expelled out is called breathing , and the overall exchange and transport of gases in the body is termed respiration . 🔍 Types of Respiration Aerobic respiration – Uses oxygen to release energy from glucose. Anaerobic respiration – Does not require oxygen (e.g., in some microorganisms and muscle cells temporarily). In humans, we perform aerobic respiration , and our respiratory system supports this vital function. 🏗️ Human Respiratory System – Structure Let’s go step-by-step through the parts of the human respiratory system: 📌 1. External Nares (Nostrils) Openings through which air enters the body. 📌 2. Nasal Passage Warms, moistens, and filters air. Lined with mucus and cilia. 📌 3. Pharynx Com...