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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
How does your organs work with other systems to keep the body working?
They work together with the use of hormones and negative feedback mechanisms. There are releasing hormones as well as stimulating hormones from the pituitary gland which detect when an organ needs to be stimulated or decreased in activity. The whole mechanism is called the Homeostatic mechanism
What is the function of a capillarie?
Capillaries make possible the exchange of molecules between blood and interstitial fluid. Sphincters open and close to regulate the flow of blood through capillary beds.
Why the colour of vein is green?
No, blood is NEVER any colour but red, just different shades. The green-blue colour is due to the veins being close to the surface and therefore being affected by the pigment in your skin.
What important things happen in the capillaries?
materials are transferred between the body's cells and the blood.
Materials are transferred between the body's cells and the blood.
Taken from: What_important_thing_happens_in_the_capillaries
(this question is actually misspelled.)
Do capillaries leak out 1.5mL of fluid a minute?
I just had the question "Every minute, about 1.5mL of fluid leaks out of the capillaries" on a true/false quiz and the answer was true.
The system whose major function is to remove excess tissue fluid is the?
Well, the kidneys and the excretory system maintain water balance in the body. When your kidneys are functioning poorly, you will see edema or swelling of the extremities. However, the fluid from circulation that pools in capillary beds are removed through the action of the skeletal muscles. As blood cells circulate, they deliver nutrients and oxygen to the capillaries in lymph or interstitial fluid. This fluid is driven back into the bloodstream or lymphatic system through the movement of muscles in the body. This is why it is important for patients in hospitals to get up and move around, if possible.
What is the function of the jugular veins?
To drain blood from the cranium into the subclavian veins into the superior vena cava into the right atrium of the heart.
Are capillaries under high or low pressure?
Average pressure, think about it as the distance from the heart. Capillaries are exactly the half way point between veins and arteries. Arteries are high pressure, veins are low pressure.
Can carnitine be synthesized in the body and if so what is the pathway?
Carnitine is synthesized from the amino acid lysine. The first enzyme in the biosynthesis, N-trimethyllysine hydroxylase, is most concentrated in the mitochondria of kidneys and liver tissue. The full pathway is mentioned in the Clin Chem reference in graphical form (nice).
From the JBC article:
In the carnitine biosynthetic pathway, trimethyllysine is first hydroxylated at the beta position by epsilon-trimethyllysine hydroxylase (TMLH1), after
which the resulting epsilon-hydroxytrimethyllysine is cleaved by a
specific aldolase into -trimethylaminobutyraldehyde and glycine
(6, 8). Subsequently, -trimethylaminobutyraldehyde is
oxidized by -trimethylaminobutyraldehyde dehydrogenase to
form -butyrobetaine (9). In the last step, -butyrobetaine is
hydroxylated at the -position by a second hydroxylase, -butyrobetaine
hydroxylase, yielding L-carnitine
Also see http://www.answers.com/carnitine
What is the importance of oxygen consumption?
use of oxygen increases the energy output of suger burning almost 20 fold
Osmotic pressure
The capillaries are where the actual transfer of oxygen to the cells happen making it the absolute essential part of the system. The lungs/gills/skin whole job is to get oxygen into the bloodstream so that the capillaries have oxygen to transfer to the cells. The hearts whole job is to supply enough pressure to circulate the blood past the capillaries so it constantly has new oxygenated blood to transfer oxygen to the cells.
--Ryan F
