Lucia DĂnĂilĂ

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CONTRIBUTIONS TO THE KNOWLEDGE OF THICKNESS AND STRUCTURE OF 1ST ORDER MUSCULAR FASCICLES, AT BROILER CHICKENS "Ross - 308"

Lucia Dănăilă, I. Vacaru-Opriş, Rodica Dănăilă

Abstract
To effectuate the histological studies on meat gathered from broiler chickens "Ross - 308", reared at S.C. "Avi-Top" S.A. Iaşi, were choose 4 (four) somatic muscles, considered to be representative for the provenience anatomical regions. Because we want to make a detailed characterization of the quality of the analysed muscles under histological aspect were determinate also the main dimensional elements of 1st order muscular fascicles (great diameter - µ; small diameter - µ; average diameter - µ; rate DM/Dm and square area per transversal section - µ2), together with the number of muscular fibres and myocytes density-nr.f.m./mm2. Generally, from the obtained data resulted, as it was normal, a directly proportional rate between the values of dimensional elements of myocytes from the studied muscles and the ones calculated for 1st order muscular fascicles. Exception from the rule, was at medial gastrocnemius muscle at which the square area on transversal section of 1st order muscular fascicles was of only 58,440.94 ± 8,025.92 µ2, at both sexes, face to 184,831.65 ± 24,457.19 µ2, at both sexes, in profound pectoral muscle and of 66,387.97 ± 15,437.73 µ2, at both sexes, in superficial pectoral muscles.

Key words: bird's meat, muscles, histology