The heart is a curved muscular tube lying in the postabdomen, or close to the stomach.

The vessels are elastic, muscular tubes that carry blood to every part of the body.

Urine travels through muscular tubes, called the ureters, to the bladder.

The esophagus is the muscular tube that connects the throat to the stomach.

After the food has been swallowed, it's carried down the oesophagus (a muscular tube) towards the stomach.

Food moves from the throat to the stomach through a hollow, muscular tube called the esophagus.

The muscular tube is right next to the heart's upper left chamber.

The esophagus is a muscular tube extending from the pharynx to the stomach.

After we swallow food, it travels down a muscular tube to the stomach.