### conduit | tube:

Capillary
* Capillaries Watch the exchange of gases that takes place in the capillaries
  - also help control the amount of heat lost through the skin
  - appear as elongated, often branched structures, located in a clear space
  - are actually very tiny little arteries and veins
* Capillaries are also interwoven among sweat tubules
  - involved in the body's release of excess heat
  - better able to stretch thus increasing blood flow
  - between veins and arteries and they supply tissue with blood
* Capillaries are blood vessels whose walls are formed by only one layer of cells, the endothelium
  - concentrated into capillary beds
  - embedded in tissue, they allow the exchange of gases within the tissue
  - fragile and can be damaged easily
  - lined with endothelial cells
  - located in the papillae
  - microscopic vessels
  - one cell thick
  - only one-cell thick
  - our smallest blood vessels
  - part of thermometers
* Capillaries are small , and smaller than any other blood vessels
  - vessels where arteries and veins meet
  - so small that only one cell can pass through at one time
* Capillaries are surrounded by blood capillaries
* Capillaries are the largest of the blood vessels
  - points of exchange between the blood and surrounding tissues
  - semi-permeable membrane
  - site of gas exchange
  - smallest blood vessels in the body
  - thin-walled vessels which form a network connecting the arteries and veins
  - tiny vessels lined by a single layer of endothelial cells
  - very near the surface
* Capillaries are very small blood vessels that carry blood to all parts of the body
  - that surround muscle fibres
  - thin and fragile and are only one epithelial cell thick
  - bring the milk building blocks to alveoli cells for milk assembling
* Capillaries carry blood
  - oxygen
* Capillaries connect arteries to veins
  - the ends of the smallest arteries with the beginnings of the smallest veins
* Capillaries connect the smallest arteries with the smallest veins
  - arteris with the smalest vaines
  - veins to arteries
  - converge to form venules
  - differ in their permeability throughout the body
  - exchange the blood from the arteries for the blood from the veins
  - expand, activating blood circulation throughout the whole body to enhance metabolism
  - feed and remove cell waste, thus connecting arterioles and venules
* Capillaries form a dense network in all organs so that all cells are close to a capillary
  - network that distributes blood to all parts of the body
  - go between arteries and veins
* Capillaries have a diameter that is approximately the same as a single cell in the body
  - no tunica media nor externa
  - thin walls
* Capillaries includes readsides
  - sections
* Capillaries is where exchange occurs
  - the oxygen is utilized by the body
  - join arterial blood flow to venous blood flow
  - located under the tongue permit the vitamin to directly enter the bloodstream
  - possess neither a tunica media nor a tunica adventitia
* Capillaries separate a gas from a liquid
  - serve for exchange of substances including blood gases
* Capillaries surround alveoluses
  - and saturate the brain
  - glands
  - individual collagen bundles within the endotenon
  - sweat glands
  - usually are bilateral and are symmetrically distributed on the skin
  - wind around and exchange materials with the tubule
* Many capillaries are ruptured, and red and white blood corpuscles are also absorbed
  - lie just beneath the cuticle, making the exchange of gases easy
* Most capillaries are part of thermometers.
* Most capillaries are surrounded by blood capillaries
* Most capillaries carry blood
  - have walls
* Most capillaries surround alveoluses
* Some capillaries are open on one end and release RBCs into the spaces surrounding the blood sinuses.
* Some capillaries are surrounded by bowman capsules
  - collect water
  - move water
* Some capillaries surround distal tubules
  - nephron tubules
  - proximal tubules
+ Blood vessel
  * A 'blood vessel' is a tube that carries blood. Blood vessels that take blood away from the heart are arteries. Blood vessels that take blood back to the heart are veins. Capillaries are between veins and arteries and they supply tissue with blood.
+ Circulatory system: Cardiovascular system