Final answer:
The hollow space surrounded by a series of tissues in the digestive system is called the gastrointestinal (GI) tract. It starts at the mouth and includes several organs through which food is digested, nutrients are absorbed, and waste is expelled.
Step-by-step explanation:
The digestive system consists of a series of tissues surrounding a hollow space known as the gastrointestinal (GI) tract. The GI tract starts at the mouth and includes the pharynx, esophagus, stomach, small intestine, and large intestine, through which food is digested and absorbed.
These organs form a continuous tube that enables the process of digestion, where food is broken down into smaller molecules that are absorbed and used by the body for energy, growth, and repair. The muscular walls of these organs facilitate the movement of food through the GI tract by a process called peristalsis. Additionally, accessory organs like the pancreas, liver, and gallbladder play crucial roles in digestion by secreting enzymes and other substances necessary for breaking down food.
The digestive process is intricately controlled by both hormonal and nervous system signals to efficiently extract nutrients and manage waste products.