Qon organizmning eng muhim to’qimalaridan biridir. Qon, limfa va to’qimalar aro suyuqligi organizmning ichki muhitini tashkil qiladi. Organizmning barcha to’qima va hujayralari fizik-kimyoviy xossalari va tarkibi nisbatan doimiy bo’ladigan ana shu suyuqliklarning muhitidagina normal yashay oladi. Issiq qonli (gomoyoterm) hayvonlar qoni uzoq davom etgan evolyutsiya mahsulidir. Oddiy bir hujayrali hayvonlarda qon yo’q. Ular hayoti uchun zarur moddalarni hujayra po’sti orqali oladi, chiqindi keraksiz moddalarni ham ana shu yo’l orqali chiqarib tashlaydi. Zoologik silsilaning pastki bosqichlarida turadigan hayvonlarning tomirlari ichida suvsimon suyuqlik-gidrolimfa oqadi. Uning tarkibida oqsillar va boshqa azotli moddalar kam bo’ladi. Bir muncha yuqoriroq taraqqiy etgan hayvonlarda gemolimfa paydo bo’ladi.

Дуальное обучение это такой вид обучения, при котором теоритическая часть подготовки проходит на базе образовательной организации, а практическая – на рабочем месте. Предприятия делают заказ образовательным учреждениям на конкретное количество специалистов, работадатели принимают участие в составлении учебной программы.

Menopause is a critical transitional phase in a woman’s life characterized by the cessation of ovarian function and the end of menstruation. It is often accompanied by a range of physical, emotional, and metabolic symptoms that vary in intensity and duration. Recent research indicates that vitamin D plays a significant role not only in bone metabolism but also in the modulation of menopausal symptoms. The aim of this study was to investigate the features of the menopausal course in women diagnosed with vitamin D deficiency and determine how hypovitaminosis D influences the severity of menopausal manifestations. The study revealed a notable correlation between low serum levels of vitamin D and the severity of vasomotor symptoms, mood disorders, sleep disturbances, and musculoskeletal pain. This research underlines the importance of monitoring and correcting vitamin D levels in peri- and postmenopausal women to reduce symptom burden and improve overall quality of life. The menopausal period represents a pivotal phase in the physiological aging process of women, characterized by profound hormonal, psychological, and metabolic transitions. Beyond the well-documented decline in estrogen levels, micronutrient imbalances—particularly vitamin D deficiency—have emerged as critical modifiers of menopausal health outcomes. This study explores the intricate interplay between hypovitaminosis D and the clinical progression of menopause, focusing on symptom intensity, systemic complications, and quality of life implications. The investigation, conducted on a representative cohort of postmenopausal women, revealed a significant amplification of menopausal discomfort in individuals with deficient serum vitamin D levels. Notably, manifestations such as thermal dysregulation, cognitive disturbances, emotional instability, and skeletal complaints were disproportionately prevalent in this subgroup. These findings suggest a potential therapeutic target in vitamin D optimization to mitigate the climacteric burden and promote healthier aging trajectories among menopausal populations.

Ushbu maqolada Alisher Navoiy tomonidan yozilgan “Sab’ayi Sayyor” dostoni asosida psixologik ifoda vositalari tahlil qilinadi. Unda asardagi qahramonlarning ichki kechinmalari, aqliy va hissiy kurashlari, tafakkurdagi o‘zgarishlar badiiy tasvir usullari orqali yoritilgan. Navoiy o‘zining yuqori badiiy mahorati bilan inson qalbidagi murakkab ruhiy jarayonlarni obrazlar vositasida aks ettirishga erishgan.

Uzbekistan plays a crucial role in the tourism landscape of Central Asia, serving as both a prominent destination and a key facilitator for regional tourism development. Positioned at the crossroads of the ancient Silk Road, Uzbekistan boasts a rich cultural heritage, including historic cities like Samarkand, Bukhara, and Khiva, which attract international visitors. The country’s modern infrastructure, regional connectivity, and increasing focus on tourism promotion contribute to its role as a gateway for travelers exploring Central Asia. Uzbekistan’s leadership in regional tourism initiatives, economic contributions, and its efforts to promote sustainable practices are key elements driving the growth of the tourism sector. As a cultural and historical hub, Uzbekistan not only fosters cross-border tourism within Central Asia but also strengthens regional cooperation, economic development, and cultural exchange. This paper explores Uzbekistan’s strategic position in Central Asia’s tourism industry, highlighting its impact on both national and regional tourism dynamics.