11.1 gas exchange system
thorax-✅✅ two spongy organs found inside the chest
intercostal muscle (internal)-✅✅ contract to lower the ribs downwards
and inwards
✅✅ contract to raise the ribs upwards and
intercostal muscle (external)-
outwards
diaphragm - ✅✅ sheet of fibrous tissue and muscle that separates the
throax from the abdomen
larynx-✅✅ a voice box, contains vocal cords and are using for breathing,
swalling and talking
trachea- ✅✅ the windpipe which connects the throat to the lungs
bronchi-✅✅ two brances, which each enter a lung
bronchioles-✅✅ many tiny branches from bronchi
alveoli-✅✅ tiny air sacs where gas exchange takes place
epiglottis-✅✅ a flap of which covers the opening to the larynx, stops food
from going down to the trachea
✅✅ keeps the trachea open
cartilage (function)-
pleural membrane (function) -✅✅ the lungs are held against the rib wall
by pleural membrane
how are the c-shaped rings of the cartilage connected to the trachea-✅✅
they are joined by the muscle at the back of the trachea
thorax-✅✅ two spongy organs found inside the chest
intercostal muscle (internal)-✅✅ contract to lower the ribs downwards
and inwards
✅✅ contract to raise the ribs upwards and
intercostal muscle (external)-
outwards
diaphragm - ✅✅ sheet of fibrous tissue and muscle that separates the
throax from the abdomen
larynx-✅✅ a voice box, contains vocal cords and are using for breathing,
swalling and talking
trachea- ✅✅ the windpipe which connects the throat to the lungs
bronchi-✅✅ two brances, which each enter a lung
bronchioles-✅✅ many tiny branches from bronchi
alveoli-✅✅ tiny air sacs where gas exchange takes place
epiglottis-✅✅ a flap of which covers the opening to the larynx, stops food
from going down to the trachea
✅✅ keeps the trachea open
cartilage (function)-
pleural membrane (function) -✅✅ the lungs are held against the rib wall
by pleural membrane
how are the c-shaped rings of the cartilage connected to the trachea-✅✅
they are joined by the muscle at the back of the trachea
