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internal 1st year || Veterinary Physiology

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Answers to Question No. 1 a. Reflex A reflex is a rapid, automatic, and involuntary response to a specific stimulus. It is a built-in, protective mechanism that helps the body maintain homeostasis and avoid danger without requiring conscious thought from the brain. A classic example is pulling your hand away from a hot surface before you even feel the pain. b. Ganglia Ganglia (singular: ganglion) are clusters of nerve cell bodies located outside the central nervous system (brain and spinal cord). They act as relay stations or processing centers for nerve signals in the peripheral nervous system. For example, dorsal root ganglia contain the cell bodies of sensory neurons. c. All or none principle This is a fundamental law of physiology stating that when a nerve cell (neuron) or muscle fiber is stimulated, it will respond to its fullest extent or n...
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Position and Anatomy of the Spleen in Dogs (Veterinary Anatomy)

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Position and Anatomy of the Spleen in Dogs: A Comprehensive Guide For veterinary students and anatomy enthusiasts, understanding the spleen ( lien ) is crucial due to its dynamic nature and significant clinical implications in canine medicine. As the largest secondary lymphoid organ in the body, the spleen plays a multifaceted role in filtration, immunity, and blood storage. This post explores the intricate anatomy, positioning, and physiological importance of the canine spleen. 1. Introduction to the Spleen in Dogs The canine spleen is a highly vascular, elongated, and somewhat "falciform" (sickle-shaped) organ. Unlike the liver, which is relatively friable, the spleen is soft and yielding in consistency. In a healthy dog, it typically accounts for approximately 0.2% of the total body weight . Its color can vary from reddish-brown to deep purple, depending on the degree of blood engorgement. 2. Position of the Spleen The spleen's position in the abdominal cavity...
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internal 1st year || Veterinary Anatomy || Page 3

🔬 S.V.P. University Veterinary Anatomy Exam Answers Comprehensive solutions for veterinary anatomy questions Q.5.A: How milk is bypassed in suckling calves directly from oesophagus to abomasum? This process is facilitated by a specialized anatomical structure called the oesophageal groove (or reticular groove). Mechanism: When a calf suckles, nervous reflexes (triggered by the act of sucking and the presence of liquid) cause the muscles of the oesophageal groove to contract and form a tube-like structure. Pathway: This tube creates a direct conduit from the lower esophagus, past the undeveloped rumen and reticulum, and directly into the omasum, which leads to the abomasum. Purpose: This bypasses the non-functional rumen, ensuring milk goes directly to the abomasum (the ...
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