Age related changes in morphology of the thymus of the fish, Oryzias latipes.
The thymus of the teleost fish Oryzias latipes is a paired structure found at the dorsoposterior part of the gill chamber. In 3-month-old fish, the thymus shows a great development. The thymus displays atrophy during aging, and the thymus involution continues until 5 years of age. Male thymus shows heavier involution than female thymus of the same age. Emigration of thymus cells takes place at all ages but increases with age.
D000375:Aging; D000818:Animals; D005260:Female; D005399:Fishes / Q000033:anatomy & histology*; D008297:Male; D012098:Reproduction; D012737:Sex Factors; D013950:Thymus Gland / Q000033:anatomy & histology* / Q000254:growth & development