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Capillaries
The smallest vessels in the circulatory system that are located within the tissues of the body, they transfer blood from the arteries, through the tissues to drop of nutrients and pick up waste and back to the veins.
1,213 Questions
What happen in the capillaries?
Capillary exchange- exchange of gases- internal or tissue respiration
What is the difference between the glomerulus and other capillaries in the body?
It is drained by an efferent arteriole
How do red blood cells work with capillaries?
capillaries are then tendril like viens on the end of arteries. they allow red blood cells to get closer to muscle tissue allowing oxygen to pass into the muscle, and co2 to pass out of the muscle.
Where does gas exchange occur?
gas exchange occurs between the thin walls of the alveoli and the thin walls of the capillaries
Blood hydrostatic tends to force fluid out of the capillaries?
Pressure is created by moving particles (fluid) bumping up against surfaces. In the case of blood hydrostatic pressure, blood is about 55% plasma and that plasma doesn't just flow down the length of the blood vessel but also pushes up against the sides of it creating blood hydrostatic pressure. Now there are different kinds of capillaries but in general they are all quite leaky. When you have fluid pressure pushing up against a leaky wall, some of that fluid is going to get out.
Why should each sample be tightly packet in melting poin tinto the capillary tube prior to heating?
It is Important to pack tightly in order to prevent the entrance of air into the capillary tube.
Why are leydig cells located close to the capillaries?
because they are hormone-secreting and so they have to be in close contact with blood vessels
diapedesis
What tissues and organs do not have capillaries?
Tissue without capillaries is called avascular tissue. Examples of avascular tissue include:
- Cartilage
- Epithelia
- Cornea
- Lens
All organs contain blood vessels.
Diapedesis
Water travels up a tree through small tubes called xylem. As water is released through the leaves of the tree, it creates a negative pressure at the top of the tree. Even though the weight of all the water is dragging it down via gravity, the adhesion and cohesion properties of water create a strong attraction between the water molecules. Another property that helps is capillary action, where the water molecules are more strongly attracted to the walls of the xylem than they are to each other. The height that capillary action can draw water is inversely proportional to the width of the tube, which means that the xylem and stomata can draw water up and incredible distance.
Why do capillaries have semi permeable walls?
to allow for gas exchange (oxygen and carbon dioxide)
Capilaries are all over you body but capilaries are a very specific topic for people and medicine students , a specific part were capilaries take place is the respiratory system for example the alveoli which are tiny sacks which are millions of them in our lungs and capiliries cover the alveoli mostly the capilaries are thin because they take out carbon dioxide out of your system.
What is the structure of the capillaries?
one cell thick
they connect arteries (from heart) to veins (to heart).
there are ALOT of them... every cell is within a few cells of one
What structures control blood flow into capillary beds?
Elastic arteries are closest to the heart and expand and contract to control blood pumping from the heart and to maintain blood pressure.
Next is muscular arteries that are mostly muscle that control flow to organs and tissues.
Arterioles are nextand change size based on sypathetic or endocrine system (ex: fight or flight) and allow more or less blood to reach the capillaries and be exchanged.
The blood then flows into the capillaries.
What is the path of a drop of blood from the aorta to the capillaries in the big toe?
As oddly specific as this question is the flow would probably follow the path below: Aortic Arch==>Descending Aorta==>either the left or right Common Illiac Artery==>External Illiac Artery==>Femoral Artery==>from here there are two options to get to the Hallucis (big toe) The first is that the blood flows through the Anterior Tibial Artery then into the Medial Dorsal Artery or Lateral Dorsal Artery which merge to form the Arcuate Artery. From here will come smaller un-named arteries to supply the top of the big toe. The other option is that blood flows through the Posterios Tibial Artery then into the Medial Plantar Artery and Lateral Plantar Artery which merge to form the Plantar Arch. Again smller un-named arteries come from the arch to suplly the underside of the big toe this time.
What would happen if you didnt have capillaries?
If we didn't have capillaries, we would die. This is because CAPILLARIES are the passageways between the arteries (carrying oxygen- rich blood AWAY from the heart) and the Veins (carrying oxygen- poor blood back INto the heart). Capillaries come in close contact with the body's organs. They exchange their oxygen- rich blood (provided by the arteries) with the organ's oxygen- poor blood (containing carbon dioxide). Thus, the body's organ supply of oxygen- rich blood is replenished. Then, the capillaries give their oxygen- poor blood (from the organs) to the Veins, which bring the blood back to the heart, so it can be filled with oxygen again. It's all a big cycle, and our capillaries play a big role in this cycle. The heart, blood, and blood vessels (arteries, veins, and CAPILLARIES) are all a part of the amazing Cardiovascular System! (Also known as Circulatory system) We really need those Capillaries !! So... What would happen, you ask? Well, the blood in the arteries an the blood in the veins would mix. That is very bad. Our body could not survive if oxygen-rich blood and oxygen- poor blood mixed. We have the capillaries to ensure they never interact!!
