13.1 POJA-L4622+4623+4624
Title: Umbilical vessels (human)
Description:
(A): Umbilical artery, Azan, preterm pregnancy. This artery displays a characteristic wall construction. In cross-section the media show distinct two layers of longitudinal and circular smooth muscles (SMC). (1) Intima with longitudinal SMC, there is no internal elastic lamina present. Media with (2) circular SMC and (3) longitudinal SMC. (4) Very thin adventitia adjacent to the bluish-stained Wharton jelly (cell-rich connective tissue, 5) of the umbilical cord.
(B): Umbilical vein, Azan, preterm pregnancy. (1) Intima, (2) media with loosened and two to three layers of irregular distributed smooth muscle bundles (3) thin adventitia close to the blue-stained Wharton jelly (cell-rich connective tissue, 5) of the umbilical cord.
(C): Umbilical vein, Haematoxylin-eosin, at term pregnancy. (1) Intima, (2). Thick media with smooth muscle bundles. (3) Thin adventitia close to the Wharton jelly (5) of the umbilical cord.
Background: Blood in the umbilical artery contains less oxygen than in the umbilical vein. The umbilical artery possesses longitudinal arranged smooth muscle cells (SMC) within the intima and is therefore also referred as an arterial constrictor (synonymous to the German terms ‘Polsterarterie’, ‘Drosselarterie’, ‘Sperrarterie’). These SMCs resemble the epithelioid cells in the walls of the arteriovenous-anastomoses and they regulate by contraction the blood flow.
Keywords/Mesh: cardiovascular system, vascularisation, umbilical artery, umbilical vein, vascular constrictor, arterial constrictor, Wharton jelly, Sperrarterie, histology, POJA collection
Title: Umbilical vessels (human)
Description:
(A): Umbilical artery, Azan, preterm pregnancy. This artery displays a characteristic wall construction. In cross-section the media show distinct two layers of longitudinal and circular smooth muscles (SMC). (1) Intima with longitudinal SMC, there is no internal elastic lamina present. Media with (2) circular SMC and (3) longitudinal SMC. (4) Very thin adventitia adjacent to the bluish-stained Wharton jelly (cell-rich connective tissue, 5) of the umbilical cord.
(B): Umbilical vein, Azan, preterm pregnancy. (1) Intima, (2) media with loosened and two to three layers of irregular distributed smooth muscle bundles (3) thin adventitia close to the blue-stained Wharton jelly (cell-rich connective tissue, 5) of the umbilical cord.
(C): Umbilical vein, Haematoxylin-eosin, at term pregnancy. (1) Intima, (2). Thick media with smooth muscle bundles. (3) Thin adventitia close to the Wharton jelly (5) of the umbilical cord.
Background: Blood in the umbilical artery contains less oxygen than in the umbilical vein. The umbilical artery possesses longitudinal arranged smooth muscle cells (SMC) within the intima and is therefore also referred as an arterial constrictor (synonymous to the German terms ‘Polsterarterie’, ‘Drosselarterie’, ‘Sperrarterie’). These SMCs resemble the epithelioid cells in the walls of the arteriovenous-anastomoses and they regulate by contraction the blood flow.
Keywords/Mesh: cardiovascular system, vascularisation, umbilical artery, umbilical vein, vascular constrictor, arterial constrictor, Wharton jelly, Sperrarterie, histology, POJA collection