'In the upper part of the chest, this ringed tube about 1 inch in diameter splits to form 2 tubes called bronchi'
the trachea
THE BODY HUMAN: In the upper part of the chest, this ringed tube about 1 inch in diameter splits to form 2 tubes called bronchi
In the upper part of the chest, this ringed tube about 1 inch in diameter splits to form 2 tubes called bronchi
In the upper part of the chest, this ringed tube about 1 inch in diameter splits to form 2 tubes called bronchi
THE BODY HUMAN
the trachea
THE BODY HUMAN