Describe the muscular layer of the esophagus
A) inner circular layer and outer longitudinal layer; superior third is skeletal muscle, middle third is mixed skeletal and smooth muscle, inferior third is smooth muscle
B) inner longitudinal layer and outer circular layer; superior third is skeletal muscle, middle third is mixed skeletal and smooth muscle, inferior third is smooth muscle
C) inner circular layer and outer longitudinal layer; superior third is smooth muscle, middle third is mixed skeletal and smooth muscle, inferior third is skeletal muscle
D) inner longitudinal layer and outer circular layer; superior third is smooth muscle, middle third is mixed skeletal and smooth muscle, inferior third is skeletal muscle
E) inner circular layer, middle oblique layer, outer longitudinal layer; inner layer is smooth muscle, middle oblique layer is mixed smooth and skeletal muscle, outer longitudinal layer is skeletal muscle
Answer: A
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