Digestive System Quiz

Which part starts the process of digestion?

• Stomach

• Mouth

• Esophagus

• Large Intestine

Answer explanation

The process of digestion begins in the mouth, where food is mechanically broken down by chewing and mixed with saliva, which contains enzymes that start the chemical digestion of carbohydrates.

What carries food from the mouth to the stomach?

• Small Intestine

• Esophagus

• Large Intestine

• Trachea

Answer explanation

The esophagus is the tube that connects the mouth to the stomach, transporting food through muscular contractions. The small and large intestines are involved in digestion and absorption, while the trachea is for air passage.

The stomach’s job is to…

• Absorb nutrients

• Mix and break down food

• Remove waste

• Chew food

Answer explanation

The stomach's primary function is to mix and break down food using its muscular walls and digestive juices, preparing it for nutrient absorption in the intestines. Therefore, the correct answer is 'Mix and break down food'.

Where are nutrients absorbed?

• Small Intestine

• Stomach

• Large Intestine

• Esophagus

Answer explanation

Nutrients are primarily absorbed in the Small Intestine, where the majority of digestion occurs. The Stomach mainly breaks down food, while the Large Intestine absorbs water and the Esophagus transports food.

Which organ removes water from waste?

• Stomach

• Esophagus

• Large Intestine

• Small Intestine

Answer explanation

The large intestine is responsible for absorbing water from waste, turning it into solid stool. The stomach and intestines primarily digest food, while the esophagus transports it.

Which helper in the mouth makes food soft?

• Saliva

• Tongue

• Teeth

• Air

Answer explanation

Saliva is a digestive fluid produced in the mouth that helps soften food, making it easier to chew and swallow. While teeth break down food and the tongue helps move it, saliva is the key component that softens it.

What happens to food that cannot be digested?

• It becomes nutrients

• It leaves the body as waste

• It stays in the stomach

• It disappears

Answer explanation

Food that cannot be digested is not absorbed by the body and is eliminated as waste. This process ensures that undigested material is removed, making 'It leaves the body as waste' the correct answer.

Which organ looks like a long winding tube for nutrient absorption?

• Stomach

• Small Intestine

• Large Intestine

• Esophagus

Answer explanation

The small intestine is a long, winding tube that plays a crucial role in nutrient absorption, unlike the stomach, large intestine, or esophagus, which have different functions in the digestive system.

Which happens first in digestion?

• Food reaches the small intestine

• Food is chewed in the mouth

• Waste is removed

• Food is mixed in the stomach

Answer explanation

Digestion begins in the mouth where food is chewed, breaking it down into smaller pieces. This is the first step before it moves to the stomach and small intestine.

Which of these is NOT part of the digestive system?

• Stomach

• Esophagus

• Lungs

• Small Intestine

Answer explanation

The lungs are part of the respiratory system, not the digestive system. The stomach, esophagus, and small intestine are all key components of the digestive system, responsible for processing food.