### conduit | tube | capillary:

Blood capillary
* Blood capillaries are found beneath the dermis, and are linked to an arteriole and a venule
  - epidermis, and are linked to an arteriole and a venule
  - penetrate deeply into the interior
* Every blood capillary is surrounded on all sides by air.

Catheter
* Most catheters have tips shaped more or less like the tip of a boar's penis
  - insert into ureters
* Some catheters add resistance
  - are supposed to deteriorate with betadine, others can only use betadine
* Some catheters insert into colons
  - noses
  - proximal colons
* are a common source of infections
  - more likely to become infected than fistulas or grafts
  - tools
  - tubes placed inside hospital patients
* includes readsides
  - sections

### conduit | tube | catheter:

Foley catheter
* allow families to go out without worrying where the bathroom is.
* are too short to reach the bladder of male dogs.
* is inserted into the bladder.

Copper tube
* has a long, successful application history in radiant systems.
* is relatively easy to manufacture and form.
* run underground carry refrigerant that circulates into and out of a home.
* transfer the collected heat to the working fluid more effectively than aluminum tubes.

Discharge tube
* Some discharge tubes have walls.
* device in which a gas conducting an electric current emits visible light.

Ear tube
* act as an escape mechanism to keep pressure equalized.
* are small plastic or metal tubes that are inserted in the eardrum.
* function as an artificial eustachian tube.
* seem to have no impact on a child's language development.
* stay in the ear usually between six months and two years.

Eustachian tube
* are extremely important to frogs
  - part of human bodies
  - pipes
  - short and straight so ear problems are common
* equalize air pressure in the ears.
* lead to middle ears from nasopharynx, the upper portion of pharynx.
* ventilate the ear.

### conduit | tube:

Fluorescent tube
* Most fluorescent tubes contain mercury and are regulated as a federal universal waste.
* Some fluorescent tubes produce energy
  - less energy
* Some fluorescent tubes use electricity
  - static electricity
* are more efficient than traditional incandescent bulbs
  - rich in ultraviolet light which is very destructive to color
* can cause noticeable flicker
  - give a white light, which some people prefer to other colours of light
* come close to duplicating the color spectrum of sunlight.
* have no filament to glow.
* listed as white or daylight are less desirable for indoor plant growth.
* lose intensity with age.
* make white light in two stages.
* produce a more natural light and much less heat.
* provide one of the best artificial light sources available for plants in the home.
* provide the best artificial light sources available for plants in the home
  - light source, which comes from behind the crystal layer
* vary in red-blue output.

Glass tube
* Most glass tubes contain liquids.
* Some glass tubes use litmuses.

Gun barrel
* Some gun barrels are part of guns
  - pistols
  - rifles
  - tanks
* leave telltale markings on bullets and shell casings.
* tend to walk as heat is generated as a result of discharging a round.

Hollow tube
* Some hollow tubes extend from mouths
  - have centers
  - pass through urethras
* can become echo chambers, amplifying noise.
* constructed from soil, climbing up a foundation sign of termite activity.

Hose
* carries water.
* connects to machines.
* is capable of water plants
  - garments
* is located in fire engines
  - garages
  - greenhouses
  - hardware stores
  - shops
  - yards
  - physical objects
  - solid objects
* is used for watering gardens

### conduit | tube | hose:

Pneumatic hose
* are free of damage or deterioration.
* make a distinction between hoses with external and internal tolerances.