Bài giảng Sinh lý động vật nâng cao: Phần 1 - PGS. TS. Nguyễn Bá Mùi

Understanding the intricate processes of the digestive system in monogastric animals is paramount for optimizing their health, nutrition, and productivity. Efficient digestion and nutrient absorption are fundamental for growth, energy metabolism, and overall physiological well-being. This document delves into the foundational aspects of tiêu hóa ở động vật dạ dày đơn, presenting a comprehensive overview of its structural components, basic functionalities, and the sophisticated regulatory mechanisms that govern its operation. It highlights the coordinated actions required from food intake to initial processing, setting the stage for deeper insights into animal physiology.

Sinh viên, nhà nghiên cứu và chuyên gia trong lĩnh vực sinh lý động vật, chăn nuôi và thú y.

This academic text provides a detailed exploration of tiêu hóa ở động vật dạ dày đơn, beginning with the fundamental cấu tạo và chức năng đường tiêu hóa. It outlines essential processes such as food transport, mechanical and chemical digestion facilitated by enzymes and microorganisms, and subsequent nutrient absorption. The document categorizes animals based on their diet—carnivores, herbivores (ruminants and simple-stomached), and omnivores—and discusses how their digestive anatomy, including the development of epithelial cells in various sections like the esophagus and intestines, has adapted to their specific feeding strategies. A significant portion is dedicated to the sophisticated điều khiển chức năng hoạt động đường tiêu hóa. It elucidates the dual control mechanisms: kiểm soát thần kinh, involving both extrinsic (sympathetic, parasympathetic) and intrinsic (enteric nervous system, short and long reflexes) pathways, and kiểm soát hormon, detailing the roles of key hormones like gastrin, cholecystokinin (CCK), gastric inhibitory peptide (GIP), and vasoactive intestinal peptide (VIP). These controls are further categorized into three phases: cephalic, gastric, and intestinal, demonstrating the integrated regulation of digestive secretions and motility. Furthermore, the document examines sự thu nhận thức ăn, exploring factors influencing tính ngon miệng và sự lựa chọn thức ăn, such as taste and smell perception across different species, and the neuro-hormonal regulation of thèm ăn via glucose levels, body temperature, and hypothalamic centers. Specific sections cover the functions of salivary glands, the intricate process of nuốt thức ăn, esophageal transport, and ultimately, tiêu hóa ở dạ dày, including its anatomical structure (e.g., regions like fundus, pylorus) and the types of muscular contractions (tonic, peristaltic) that churn food and propel it towards the small intestine. This comprehensive overview highlights the complex interplay of physiological mechanisms ensuring efficient nutrient processing in monogastric species.