### substance | liquid | cholesterol:

High cholesterol
* Some high cholesterol causes diseases
* can also cause heart problems.
* can be a a symptom for a deeper problem, such as obesity or atherosclerosis
  - cause of heart attack and stroke
  - begin in childhood with poor eating habits and lack of exercise
  - cause cramps, chest pain, heart attacks and strokes
  - impair circulation to inflamed or swollen joints
  - lead to heart problems
* can run in families, for example, due to genetic factors
* causes hardening of the arteries
  - sticky substances, called plaques, to be deposited on artery walls
* clogs arteries.
* contributes to heart disease and heart attack
  - the build-up of plaque in the artery walls
* has no symptoms
  - warning signs
* increases risk of heart disease in young men.
* increases the risk of coronary heart disease
* is an excessive level of cholesterol in the blood
  - important risk factor for heart disease
  - associated with cardiovascular disease
  - common after a kidney transplant
* is linked to blockage of arteries and heart attacks
  - strokes, hardening of the arteries, and heart attacks
  - one factor in atherosclerosis, high blood pressure, and heart attacks
* is one of the five major risk factors of heart disease
  - main causes of heart disease and heart attacks
  - the leading cause of heart disease
  - thought to be a risk factor for stroke
  - treatable through diet, exercise, and medication
* is, of course, a scientifically documented risk factor for heart disease.
* known risk for diabetes patients.
* leading risk factor for heart disease.
* leads to plaque on artery walls.
* major risk factor for heart disease.
* needs to be controlled first by diet.
* risk factor for people with heart disease
* runs in families
  - our family

### substance | liquid | cholesterol:

Liquid crystal
* Many liquid crystals are simple polymeric organic compounds.
* Some liquid crystal reacts to heat.
* Some liquid crystals change color when their temperature changes
  - exhibit what are known as re-entrant phases , as shown on the diagram below
* act like shutters in display screens.
* appear to be the material of choice for flat panel displays.
* are a state of matter, just like the better-known states of liquid, solid and gas
  - order between crystals and liquids
  - an important component of living systems
  - another example
* are states of matter intermediate between normal crystals and normal liquids
  - normal liquids and normal crystals
  - unique systems where topological structures are accessible for detailed studies
* attach themselves to the carbon atoms and are aligned.
* change color with temperature in the visible region.
* consist of elongated and rigid molecules.
* exhibit an array of topological defects, such as strings and monopoles.
* lack the full three dimensional position and orientation order of ordinary crystals.
* make fine optical switches.
* provide their own temperature indicator.
* reacts predictably when electrically stimulated.
* rotate the light so that it fits through the filter.

Plasma cholesterol
* continues to be of concern for many people in the United States today.
* is lowered by estrogens which are protective against atherosclerotic disease.

Total cholesterol
* is broken down into different categories.
* marker of risk for coronary heart disease.

Clear liquid
* tend to be easiest to swallow and digest.
* turn blue, while darker liquids become cloudy and a precipitate forms on the surface.

Combustible liquid
* are more hazardous than flammable liquids.
* is released if containers rupture or explode under fire conditions.