Topic: Food Energy and Respiration Subtopic: Introduction
How does air reach blood vessels?
Answer: Air enters in the body through two passages i.e. nasal cavity (nose) and oral cavity (mouth). Afterwards, the air passes through trachea (windpipe) and reaches the bronchi. From bronchi the air moves to bronchioles and then reaches the alveoli (air sacs). The exchange of gases takes place in alveoli as blood vessels are present there.
Learn also:
- What is our body made up of?
- How can indigestion cured?
- How many chemicals are used in tobacco smoke?
- Why do not plants require huge amount of raw materials?
- What is job of red blood cells?
- What is chemical process in digestion?