Veins and arteries are the passageways blood uses to travel throughout the body.
heart
the passage way of blood is the vessel
Esophogus
Air and food can both travel through the pharynx. It serves as a passage for air to reach the lungs through the trachea and for food to reach the esophagus on its way to the stomach.
the esophagus, of course
The tricuspid valve serves as a one way gate. It allows the blood to only travel in one direction from the right atrium to the right ventricle.
Blood cells travel to and from the pump called the heart by way of the blood vessels called the arteries and veins.
It serves as a passage way for food travelling from the oral cavity to the esophagus and for air travelling from the nasal cavity to larynex
The passage way through mountains is called a mountain pass. It is a route through a mountain range that allows for travel between different regions.
The trachea is the passage way for air to travel from the larynx to the lungs.
What is the passage way into the cell?
All the cells require oxygen, and so the way of them getting it is via the blood.