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 ,

Ledertavle

Visuell stil

Alternativer

Bytt mal

Gjenopprett automatisk lagring: ?