2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Cov hlab ntsha mesenteric (IMA) yog ib ceg loj ntawm lub plab aorta. Nws muab cov ntshav hlab ntsha mus rau hauv nruab nrog cev ntawm hindgut- qhov distal 1/3 ntawm txoj hnyuv loj transverse, splenic flexure, descending colon, sigmoid colon thiab rectum.
Dab tsi yog qhov qis mesenteric hlab ntsha muab?
Cov hlab ntsha mesenteric qis, kuj yog ib ceg ntawm lub plab aorta, muab cov distal thib peb ntawm txoj hnyuv loj, cov hnyuv loj zuj zus thiab cov hnyuv loj sigmoid, thiab qhov zoo tshaj ntawm cov qhov quav raws li cov hlab ntshav hemorrhoidal zoo tshaj.
Cov khoom nruab nrog cev dab tsi yog muab los ntawm cov hlab ntsha mesenteric tsis zoo thiab nws cov ceg xaiv txhua yam uas siv?
Vascular mov
Cov hlab mesenteric inferior, kuj yog ib ceg ntawm lub plab aorta, khoom siv qhov thib peb ntawm txoj hnyuv loj, cov hnyuv loj zuj zus thiab cov hnyuv loj sigmoid, thiab qhov zoo tshaj plaws ntawm lub qhov quav raws li cov hlab ntsha hemorrhoidal zoo tshaj.
Cov hlab ntsha mesenteric muab dab tsi?
Cov khoom siv mesenteric zoo tshaj plaws midgut los ntawm thaj tsam ampullary ntawm qhov thib ob ntawm duodenum mus rau splenic flexure ntawm txoj hnyuv loj. Cov hlab ntsha tsis zoo ntawm pancreaticoduodenal tshwm sim los ntawm SMA thiab, nrog rau cov hlab ntsha pancreaticoduodenal zoo, muab lub taub hau ntawm cov txiav.
qhov tsis zoo mesenteric artery nyob qhov twg?
Cov hlab ntsha mesenteric tsis zoo (IMA) yog ib qho ntawm peb qhov tsis yog khub lojsplanchnic hlab ntsha, hauv plab kab noj hniav, tshwm sim los ntawm lub plab aorta thiab muab cov hindgut. Nws yog qhov tsawg tshaj plaws ntawm peb ceg anterior visceral ntawm lub plab aorta.
Pom zoo:
Puas yog ib qho chaw zoo li lub zais pa loj ntawm cov hlab ntsha?
Aneurysm yog ib qho chaw loj ntawm cov hlab ntsha, tus yam ntxwv los ntawm lub zais pa zoo li pob. Nws tshwm sim los ntawm qhov txawv txav tsis muaj zog ntawm cov hlab ntsha phab ntsa. Feem ntau hom aneurysm muaj xws li plab aortic aneurysm, thoracic aortic aneurysm thiab intracranial aneurysm.
Cov kab mob capillaries cuam tshuam li cas nrog cov hlab ntsha thiab cov leeg?
Capillaries txuas cov hlab ntsha mus rau cov leeg. Cov hlab ntsha xa cov ntshav oxygen nplua nuj mus rau cov hlab ntsha, qhov twg qhov sib pauv ntawm cov pa thiab carbon dioxide tshwm sim. Cov capillaries tom qab ntawd xa cov ntshav pov tseg uas nplua nuj mus rau cov leeg kom thauj rov qab mus rau lub ntsws thiab lub plawv.
Puas yog cov hlab ntshav thiab cov hlab plawv zoo ib yam?
Cov kab mob plawv yog qee zaum hu ua ntshav-vascular, lossis tsuas yog cov hlab ntshav, system. Nws muaj lub plawv, uas yog cov khoom siv lub cev, thiab lub kaw lus kaw ntawm cov hlab ntsha hu ua cov hlab ntsha, cov hlab ntsha, thiab cov hlab ntsha.
Puas yog cov hlab ntsha loj dua cov hlab ntsha?
Arterioles nqa ntshav thiab oxygen mus rau hauv cov hlab ntsha me tshaj plaws, cov hlab ntsha. Capillaries yog li ntawd small lawv tsuas pom tau nyob hauv lub tshuab tsom. Cov phab ntsa ntawm capillaries yog permeable rau oxygen thiab carbon dioxide.
Ntawm qhov kis ntawm cov hlab ntsha impulses?
Cov paj hlwb raug xa los ntawm ib lub neuron mus rau tom ntej los ntawm qhov sib txawv lossis qhov sib cais hu ua qhov sib txawv synaptic lossis cleft lossis synapse los ntawm cov txheej txheem tshuaj. Synapses yog tshwj xeeb junctions los ntawm cov hlwb ntawm lub paj hlwb sib txuas lus rau ib leeg thiab kuj non-neuronal hlwb xws li cov leeg thiab qog.
