author(s)
Dharmendra Singh, Arun Kumar Mandal, Partha Das, Sanjay Ray, Nirmal Kumar Tudu, Subhasish Batabyal, Avnish Kumar Gautam, Mofijul Islam and Manish Kumar

abstract
A study was conducted on the seventy (70) day old broiler chicks which were reared up to 42 days (market age) of post hatch period. The whole experimental period of study was divided into seven (07) groups, each containing ten (10) birds irrespective of sex accordingly. Glycogen body (GB) is a transparent gelatinous, ovoid massand it extends from the level of 26 to 29 spinal nerves i.e. in lumbo-sacral (L-S) plexus. The average length and width increased 1.60 times and 1.43 times with ranged 4.31mm to 6.91mm and 2.54 mm to 3.64 mm, respectively, from group I to group VII. The mean weight of the glycogen body from group I to group VII was gradually increased with advancement of age. A highly significant difference was observed in the length as well as width in Group I to group VII with age.