Full Answer Section

Stomach: The stomach is a muscular sac that churns food and mixes it with gastric juices. Gastric juices contain enzymes that start to break down proteins.

Small intestine: The small intestine is the longest part of the alimentary canal. It is where most of the digestion and absorption of nutrients takes place.

Large intestine: The large intestine is the last part of the alimentary canal. It absorbs water and salts from food and eliminates the remaining waste products as feces.

Anus: The anus is the opening at the end of the alimentary canal where feces are eliminated

The accessory digestive structures are organs that help with the digestion of food, but are not part of the alimentary canal. These structures include:

• Salivary glands: The salivary glands produce saliva, which helps to moisten food and start to break down carbohydrates

Liver: The liver produces bile, which helps to break down fats. It also stores vitamins and minerals and helps to detoxify the blood.

Gallbladder: The gallbladder stores bile and releases it into the small intestine when food is present.

Pancreas: The pancreas produces enzymes that help to break down carbohydrates, proteins, and fats. It also produces insulin, which helps the body use glucose for energy.

The alimentary canal and the accessory digestive structures work together to break down food into absorbable units and eliminate the non-digested material as feces. This process is essential for our survival, as it provides us with the nutrients we need to stay healthy.