Goobta dawada casriga ah, tuubada buubigga ah waxay noqotaa aalad muhiim u ah daaweynta cudurro kala duwan oo loo yaqaan 'vascular' .
Naqshadaynta aasaasiga ah ee buufinta tuubbada tuubbada waxaa ku jira tuubbooyin jilicsan oo ku xidhan dhamaadka kateetarka, oo ay ku hagayaan buugaagta {{}, oo ah {-} {}} ah oo ka buuxsamaysa ashyaa'da {{-}} inta badan ka samaysan buugaagta {{}, oo ah buufinku wuxuu had iyo jeer ka kooban yahay {{} {}} ah oo ka buuxo aaladda {{}} inta badan ka samaysan yahay sheybaarka {{}} inta badan ka samaysan buugga {{}} inta badan ka samaysan buugga {{}, wuxuu leeyahay absiqort, oo uu u adkeysan karo jawiga farsamada wanaagsan ee jirka {{2.
Marka kateetarka la galiyo jidhka bukaanka oo ay gaarto qaybta cidhiidhiga ah ee bartilmaameedka xididdada dhiigga, dhakhtarku wuxuu ku durayaa mid ka buuxinta derbiga-ka-buuxinta, taas oo keenaysa in la ballaariyo oo ay u baahan tahay oo keliya hanaankan uma baahna in buufinku uusan fiicnayn Waxqabadka ballaarinta, laakiin sidoo kale in isku habboonaanta iyo xakamaynta ballaarinta waa in la hubiyaa in laga fogaado burburka aan loo baahnayn darbiga xididdada dhiigga {{}}
Markaad naqshadeyso tuubada buufidda, injineerada ayaa si buuxda u tixgelin doona waxqabadka riixitaanka iyo xakamaynta {0} ee kateetarka, iyada oo ay sidoo kale xoog yeeshaan in ay ku filan tahay in buufiska ay gaarsiiso booska bartilmaameedka. Wuxuu gaaraa ballaarinta wax ku oolka ah {{- {-}
Intaas waxaa sii dheer, turumayaasha buufinnada casriga ah ayaa sidoo kale ku daraya tikniyoolajiyad cusub oo hal-abuurnimo ah, sida hagida muuqaalka iyo ka hortagga cadaadiska ee suuragalnimada leh ee ka dhacaya beeraha iyo cilladaha suuxdinta ee suuragalnimada leh, taasoo keenta saameyn wanaagsan oo nolosha iyo tayada nolosha ee bukaanka {{1}