The thymus of the nu/+ hybrid.
D000818:Animals; D005260:Female; D006579:Heterozygote; D008297:Male; D051379:Mice; D008819:Mice, Nude / Q000033:anatomy & histology*; D009929:Organ Size; D013950:Thymus Gland / Q000033:anatomy & histology* / Q000166:cytology