What is respiratory valume ?

Explanation

**Step-by-Step Text Solution:**

1. **Definition of Respiratory Volume:**
Respiratory volume refers to the amount of air that is involved in the process of breathing. It is also known as lung volume and is measured at various stages of the respiratory cycle.

2. **Breathing Rate:**
Under normal conditions, an average adult takes about 12 to 15 breaths per minute. Each breath consists of one complete respiratory cycle, which includes one inhalation (inspiration) and one exhalation (expiration).

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