bio test
effects of smoking
smoker's cough bc of the built up mucus as cilia cant sweep it away -> lead to more chest infections
contain nicotine - addictive drug , increase heart rate , causes blockage in blood vessels -> heart attack and strokes
Cancer - tar in cigarettes contain carcinogenic chemicals
Emphysema
-alveoli breaks down , lose sa -> cant perform gas exchange as good
digestive system
mouth - oesophagus - liver - stomach - gallblasdder - pancreas - small , large intestine - rectum - anus
digestion
the process of breaking fown large , insoluble molecules into small , soluble molecules -> these molecules are then absorbed + used by the body