The adult human esophagus is an 18- to 25-cm long muscular tube that has cervical, thoracic, and abdominal parts. The esophagus wall is composed of striated muscle in the upper part, smooth muscle ...

A photo of a cyst nematode's head viewed through a high-power microscope shows its esophageal glands, which produce effectors it uses to infect host plants. The image was digitally edited to highlight ...

The adult human esophagus is an 18- to 25-cm long muscular tube that has cervical, thoracic, and abdominal parts. The esophagus wall is composed of striated muscle in the upper part, smooth muscle ...