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Fastest distribution of some injectible material/medicine and with no risk of any kind can be achieved by injecting it into the
A
Muscles
B
Arteries
C
Veins
D
Lymph vessels
Detailed Solution
A substance injected into a vein enters the blood stream directly; it is carried to the heart and then pumped to the whole body within a very short time. So intravenous injection gives the fastest distribution.
Veins are superficial, thin-walled and carry blood at low pressure, so they can be punctured safely and the bleeding stops easily.
Arteries are deep-seated and carry blood at high pressure; puncturing them is risky, and the material would reach mainly the organ supplied by that artery.
From muscles the absorption is slow (intramuscular injections are used for a slower or local effect), and lymph flows very slowly.
Hence the material should be injected into the veins.
Veins are superficial, thin-walled and carry blood at low pressure, so they can be punctured safely and the bleeding stops easily.
Arteries are deep-seated and carry blood at high pressure; puncturing them is risky, and the material would reach mainly the organ supplied by that artery.
From muscles the absorption is slow (intramuscular injections are used for a slower or local effect), and lymph flows very slowly.
Hence the material should be injected into the veins.