B2
Enzymes are biological catalysis they work by braking reactant down so has a larger surface area.
to survive they need heat and the right PH level
Type of enzymes
Amylase starch to sugar
Protease protein to amino acids
lipase lipids to glycerol
Cell organisation
Large multi cellular organisms are mad up of organ systems
Collections of simular cells are called tissues
Tissues are oranised into organs
organs are organised into organ systems
Digestive system
Salivary gland- produce amylase
Oesophagus
Liver - produce bile to neutralises stomach acid
stomach- kill Bactria and brake down food
pancreas- produce all enzymes
gall bladder- produce bile which is stored in liver
small intestines- produce all enzymes
large intestines- osmosis
rectum
the Lungs
the lungs are split into differant sections the smallest section is the alveoli and your diafram controles breathing
In your lungs o2 is diffused across membrain in avieole to the blood as well as CO2.
The circulatory system- the human system is made of deoxanated blood and oxegonated blood this is in a double circlator system
The heart
blood vessels
organisation
deoxenated blood enters in the vena cava
it enters into the right atrium
goes the the valveinto the right ventrical
the to the lungs in the pulmary artary
it comes back oxeganated into the left atrium
it goes nto the left ventrical
and out of the aorta
the heart has a pacemaker that contoles the rate of beats between the ventricals
artarys carry oxenated blood it is thic due to haveing a high blood pressure they go into capillaries wich are the smallest vessel
veins carry deoxanated blood they are thin due to low blood pressure as well have valves to carry blood in right direction
Blood
red blood cells carry blood around the body they have a large surface area and have no nucleus
white blood cells they kill pathagons they are amde of anti toxins aphagacytosis and antibodys
platelets are small bllod cells that clot up cuts as a result stopps blood loss
plasmid carries around protine CO2 hormones and urea
cardiovascular deisese- this when blood fats clog up arterys
Stents are incerted into the blood in key hole surgry lowering the risk they are effective and last a ong time
statines are used to reduce cholesterol the are hormones which brake down fatts in the blood however they are a short term drug and have neggative side effects
biolgical valve sugry is sometimes used when valves dont open and close as a result oxenated and ddeoxeagon blood is mixed
Cancer
This is when mitosis cant be controled casueing growths
Benign- this is a tumor it has no effect apart from being there
Malignat- this is cancer that can spread as a result it is dangous