comparative histomorphological study of adrenal gland in different age of sheep and goat

ninety six pairs of adrenal glands from lori – bakhtiari sheep and goat, aged 6 month to 1 year and 1 – 1.5 year from borujen abattoir were collected. after collecting the glands and weighting them, some parameters such as: length, wide and thickness of left and right side by caliper device were measured. in histological studies, after tissue preparation and staining with h&e;, cortical zones and medullae of glands were recognized and the size of zones with micrometry method were determined. at result, data between left and right adrenal glands and two ages were analyzed and compared by tstudent test. there was a significant difference between dimensions of left and right adrenal glands. the mean weight and length of left adrenal gland was greater than right in two animals. also in aged 6 month to 1 year there was a significant difference between mean length and width of right adrenal glands in two animals. the thickness two and width of left adrenal gland in sheep were larger than goat and the difference was significant (p<0.05).histological studies revealed that, there was a significant difference in size of capsule, medulla and these parameters in sheep were greater than goat. by comparing the other parameters between two aged in two animals, there was a significant difference in cortex of left adrenal gland and zona fasiculata in aged 1- 1.5 years in sheep was larger than aged 6month to 1 years in goat.