The Respiritory System Flashcards
What are two important structures in the cardiovascular system ?
the diaphragm and intercostal muscles
What are the intercostal muscles and what do they do ?
The intercostal muscles are found between the ribs and they control rib movement
What is the diaphragm and what does it do ?
The diaphragm is a sheet of muscle that separates the chest
What happens hen you breathe air in ?
The diaphragm contracts and moves downwards. The intercostal muscles contract and move the ribs upwards and outwards, This increases the size of the chest
What happen when you breathe air out ?
The diaphragm relaxes and moves back to its domed shape, The intercostal muscles relax so the ribs move inwards and downwards under their own weight, This decreases the size of the chest
Where des gas exchange take place ?
Gas exchange occurs at the alveoli in the lungs and takes place by diffusion
What is vital capacity ?
the maximum amount of air that can be breathed out after breathing in as much air as possible
What is tidal volume ?
is the amount of air breathed in with each normal breath
