Anatomy and Physiology - Biology Forums Gallery

The brains of animals of different evolutionary ages

Cerebrums are shown in yellow; brain stems are shown in purple.
The muscle-spindle feedback circuit

The muscle-spindle feedback circuit. There are many muscle spindles in each muscle; for clarity, only one much-enlarged muscle spindle is Illustrated here.
Human urinary system

B. The paired kidneys are located between the peritoneum (lining of the abdominal cavity) and the abdominal wall. C. Structure of a human kidney.
Example of a coordinated interaction between skeletal muscle tissue and nervous tissue

Sensory neurons in the lizard s eyes relay information about the position of a fly to interneurons in the lizard s brain Signals from interneurons in the lizard s brain ...

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