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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 function does a capillary serve?
A capillary is a small blood vessel in the body that branches off from the larger veins. The capillaries help get blood to the other parts of the body like the fingers and toes.
What do Cohesion and Adhesion have to do with Capillary action?
The liquid rises up due to the forces of adhesion between the capillary and liquid..
It rises till the extent when adhesive and cohesive forces and external forces balance each other...
How many capillaries are there in the glomerulus?
A crude estimate using fluid dynamics gives 1.92x10^9. So around 2 billion.
However, this source says the normal range of physiological estimates is 3.2×1010-4.2×1010, which is 32 to 42 billion (http://www.springerlink.com/content/7x55l04161513q15/)
What is the process by which oxygen enters the blood in the capillaries that surround the alveoli?
my guess is facilitated transport so since anyone could write anything on here weather is wrong or not. i decided to show ya.
CORRECT ANSWER IS:Diffusion
facilitated transport is wrong
What is the purpose of capillaries?
the smallest vessales that form an extensive network of vessels in the body organs, connecting arteries to veins.
Why do lymphatic capillaries have valves in them?
Valves in veins are one way valves in the tunica intima(endothelium) of the drainage vessel. They allow the blood to defy gravity and continue circulating up towards the heart to dump into the inferior/superior vena cava. They ensure that blood travels the direction it is supposed to, and does not fall back the wrong way. Lymphatic capillaries are part of the capillary exchange that occurs from artery->artierole->CAPILLARY DIFFUSION->venule->vein->heart. they are an accessory drainage system, beginning blindly in the body and eventually meeting up with the vein again.
Why does capillaries form dense networks in tissues with a high metabolic rate?
A high metabolic rate means that the cells in the tissue will require a high rate of gas exchange as the cells will be producing a high amount of CO2 during energy production. The dense network of capillaries ensure that the cells are adequately provided with oxygen.
What are examples of substances that travel from the muscle cells to the blood in the capillaries?
i was just looking for the answer to this question for my science homework, and found the answer, and here it is....
Oxygen
Water
Carbon dioxide
Nutrients
waste chemicals :)
Why do you think capillaries surround the long tubules of nephron?
The kidney's function in filtration. The renal tubules located with in the kidney's and also known as nephrons, are the functioning units of the kidney's. Blood carries nutrients and waste. The renal tubules are surrounded by a capillary network so the blood can expel the waste material that is collects from the body. the renal tubules also replace nutrients and water that is still needed back into the capillaries.
Blood flow through capillaries is controlled by?
Pressure. Capillaries are small so the force of blood coming from the heart is at greater pressure when it reaches the tiny capillaries. Pressure forces the diffusion of particles in and the osmotic diffusion of substances out (mainly metabolic wastes) to the veins.
What causes the transfer of materials between capillaries and tissue fluid?
- As blood enters the capillary bed on the arteriole end, the blood pressure in the capillary vessel is greater than the osmotic pressure of the blood in the vessel. The net result is that fluid moves from the vessel to the body tissue.
- At the middle of the capillary bed, blood pressure in the vessel equals the osmotic pressure of the blood in the vessel. The net result is that fluid passes equally between the capillary vessel and the body tissue. Gasses, nutrients, and wastes are also exchanged at this point.
- On the venue end of the capillary bed, blood pressure in the vessel is less than the osmotic pressure of the blood in the vessel. The net result is that fluid, carbon dioxide and wastes are drawn from the body tissue into the capillary vessel.
What is the function of the capillary network in the lungs?
the four or more functions of the capillery network in the skin?
Why There is a network of capillaries in each organ?
It's called capillarization and means that every cell of your body organs/ tissues is getting blood supply for it to function properly by getting nutrients and oxygen from blood as well as eliminating waste products/toxins
Oxygen and carbon dioxide pass across the Alveolar-capillary barrier. This is the barrier that separates the air sac in the lung (the alveoli) from the miniscule blood vessel (the capillary). The barrier is extremely thin - a hundred times thinner than a regular piece of paper. Follow the Related Links below to view a Wikipedia article on this subject.
What is a vessel that returns blood back to the heart after it's passed through the capillaries?
ARTERIES carry blood TO the capillaries throughout the body, whereas VEINS carry blood FROM the capillaries and back to the heart.
Tip for rememering: A-->V (alphabetical order: arteries-->veins)
How does a glucose molecule move from the heart to a capillary next to a body cell?
LOL read the textbook
A capillary has a very narrow lumn and very thin wall. These features maximize diffusion of nutrients, wastes, and oxygen.
