Veterinary Anatomy and Physiology
Systems and integration
Anatomy and physiology questions reward a systems approach: skeletal, muscular, cardiovascular, respiratory, digestive, urinary, reproductive, nervous, and endocrine. For each, know the structure–function link - e.g., alveolar thinness for gas exchange, nephron segmentation for filtration/reabsorption, rumen papillae for volatile fatty acid absorption.
High-yield concepts
- Cardiovascular: cardiac cycle, stroke volume, cardiac output (CO = HR × SV), blood pressure regulation.
- Respiratory: negative-pressure ventilation in mammals, tidal volume, dead space.
- Digestive: monogastric vs ruminant vs hindgut fermenter; enteric nervous system.
- Reproductive: oestrous cycle phases, placental types, species-specific gestation.
- Nervous/endocrine: reflex arcs, hypothalamic–pituitary axes, negative feedback.
- Homeostasis: thermoregulation, acid–base balance, osmoregulation.
Traps to watch
Questions frequently test direction of change: does a rise in CO2 raise or lower blood pH? (It lowers it.) Does parasympathetic stimulation speed or slow the heart? (Slows.) Another trap is species-specific anatomy - e.g., the number of heart chambers in birds (four), the presence of a diaphragm (mammals only), or differences in dental formula. Diagrams described in words can be misread; sketch them.
Worked example
If heart rate is 80 beats/min and stroke volume is 50 mL, cardiac output = 80 × 50 = 4,000 mL/min = 4 L/min. If a drug halves stroke volume but doubles heart rate, CO is unchanged - a classic calculation trap.
Study approach
Draw each system once from memory, then label. Link every structure to a function and a clinical consequence.