Organs often have fluid-filled spaces called lumens, which are crucial for organ function and serve as transport and delivery ...
The early life stages of fish are marked by the rapid development of the digestive system, which plays a critical role in transitioning from endogenous nutrition, using yolk reserves, to exogenous ...
During development of the digestive system, a complex network of nerves forms around it, creating a "second brain"—the enteric nervous system (ENS)—which controls the movement of food and waste ...