the esophogus
The cardiac sphincter.
In a frog's anatomy, the esophagus leads from the mouth to the stomach. It serves as a passageway for food that has been swallowed. The esophagus is a muscular tube that helps transport food through peristaltic movements before it enters the stomach for digestion.
The digestive system includes the stomach. The stomach is a hollow, muscular organ that is capable of stretching. Food enters the stomach from the esophagus. The body system that the stomach belongs to is the digestive system.
The answer in a single word is chyme. There are gastric juices released in stomach. When food enters stomach, it starts churning(muscular contraction and relaxation). The food mixes with gastric juice to form a semi-solid acidic bulk known as chyme.
from a birds mouth uncheawde food passes into the crop, which stores the food until it absorbs enough moisture to move on. the food enters the stomach and is parcially digested. then it moves into the muscular gizzard.
Food enters the stomach from the oesophagus/gullet through a ring of muscle called a sphincter. Acid and protease (an enzyme) are then secreted into the stomach to start protein digestion. The muscular wall of the stomach also moves to cause the food to become a liquid called chyme (this is pronounced as kime).
When food reaches the bottom of the esophagus, it enters the stomach through the lower esophageal sphincter (LES). This muscular valve opens to allow the food to pass into the stomach, where it is mixed with gastric juices for further digestion. The LES then closes to prevent stomach contents from flowing back into the esophagus.
small intestine
Food leaves the stomach and enters the small intestine through the pyloric sphincter, a muscular valve at the end of the stomach. This process is controlled to ensure that the small intestine can properly digest and absorb nutrients from the food.
When food enters the stomach, it releases protein digesting chemicals such as Pepsin. It also secrets acids such as Hydrochloric Acid which breaks down the food further and also kills off any excess bacteria. The stomach is a muscular organ, so it contracts and this helps break down the food prior to it entering the duodenum.
duodenum
After the stomach, food enters the small intestine in the digestive system.