Trachea  - is a tube through which air travels down into lungs , Blood - carries oxygen to all body organs, Diaphragm - is a large muscle at tge base of ribs and helps in inhalation and exhalation, Lungs - are like balloons and they contain little sacs surrounded by blood vessels ,

Respiratory system g4

Список переможців

Візуальний стиль

Параметри

Обрати інший шаблон

Відновити автоматично збережене: ?