[Structural organization of mesenteric lymph nodes in postnatal development of the Baikal seal, Pusa sibirica Gmel].
Structural organization of mesenteric lymph nodes in the Baikal seal has been studied with regard to its age-dependent changes. It has been shown that the relative area of connective tissue structures (the capsule and trabeculae) increases during postnatal development, while the areas of the cortex and medulla decrease. The proportions of secondary lymph nodes and paracortical zone in the cortex become smaller, with the corticomedullary index tending to decrease with age. These phenomena indicate that mesenteric lymph nodes undergo regression during postnatal ontogeny, with their lymphopoietic function being attenuated. Lower values of the corticomedullary index in Baikal seal pups aged 1 month to 4 years are apparently explained by a decrease in the proportion of cortex substance related to the enhancement of the motor function of lymph nodes.
Kutyrev
I A
IA
Lamazhapova
G P
GP
Zhamsaranova
S D
SD
D000818:Animals; D008198:Lymph Nodes / Q000166:cytology* / Q000254:growth & development; D042601:Lymphatic Vessels / Q000166:cytology*; D008643:Mesentery / Q000166:cytology* / Q000254:growth & development; D009024:Morphogenesis / Q000502:physiology*; D046049:Phoca / Q000254:growth & development / Q000502:physiology*; D012800:Siberia