|
|
Štítná žláza prasat
ŠTĚCHOVÁ, Petra
Thyroid gland is very important endocrine organ that interferes with a number of processes in the body. Sufficient iodine saturation of animals is essential for optimal production of thyroid hormones. The aim of the bachelor's thesis was to determine iodine supply of slaughter pigs and morphometric parameters of thyroid glands in selected individuals. The study included 27 castrated hybrids of Czech landrace and Pietrain. Iodine content in urine was determined using the Sandell - Kolthoff spectrophotometric method. Thyroid parameters were determined microscopically: length, width, outer and inner area of the follicles and thyrocyte height. The representation of individual size categories of follicles was also determined. The average content of urinary iodine in the observed group was 350.8+-184.3 ug/l, the maximum was 608 ug/l and the minimum was 76 ug/l. Optimally saturated with iodine was 44.44 % of individuals, 11.11 % had a deficiency and 44.44 % an excess of iodine. The average length of the thyroid follicle was 149.3+-64.8 um, width 105.9+-50.6 um, outer area 16810.6+-18030.0 um2, inner area 14318.4+-16985.2 um2 and thyrocyte height 6.2+-2.6 um. In the thyroid glands was 9.4 % small, 62.8 % medium and 27.8 % large follicles. In the selected group of individuals, the impact of different iodine saturation of animals on all monitored thyroid parameters was demonstrated.
|
|
|
Ontogenetické změny štítné žlázy králíka
BLÁHOVÁ, Kateřina
The literature review of this thesis describes the thyroid gland in terms of morphology, physiology, microscopic structure, and its prenatal and postnatal development. The practical part focused on the monitoring of morphometric changes of the thyroid gland during the first 39 days of postnatal development at 24 New Zealand white rabbits. Morphometric measurements carried out were: the circumference, length and width of follicles and the height of thyrocytes. At birth, the average circumference of follicles was 134.54 ? 7,81m, with length of 41.85 ? 0.93 ?m, width of 39.45 ? 4.05 ?m, and the average height of thyrocytes was 5.12 ? 0.06 ?m. The measurements were repeated in 39 days of age (at the end of the experiment) with the average circumference of follicles being 231.53 ? 37.95 ?m, length of 71.09 ? 12.19 ?m, width of 68.97 ? 10.02 ?m and the height of thyrocytes 5.69 ? 0.42 ?m. All parameters with the exception of thyrocytes showed increased values. On average the circumference of follicles from birth to 39 days of age changed by 72.1%, the height of follicles by 69.9%, with the highest difference in width by 77.4%. At the age of 5 days the reduction in follicle size was observed, possibly due to the adaptation of thyroid gland to the postnatal period.
|
guest ::
