Digestive System

Mark the place where absorption of water occurs in the human digestive system.

Mark the place where absorption of nutrients occurs in the human digestive system.

Mark the three places that chemical digestion occurs in the human digestive system.

The diagram shows a particle of food being moved along the human digestive tract by waves of relaxation and contraction of the muscular walls of the esophagus. The process that causes the movement of food down the esophagus is known as ​ (a)   .

• peristalsis

• digestion

• gravity

• photosynthesis

• absorption

Answer explanation

Peristalsis is waves of relaxation and contraction of the muscular walls of the esophagus.

What is the main job of the digestive system?

• break down foods into nutrients that can be used by the body

• take in oxygen and exhale waste like carbon dioxide

• pump blood throughout the body

• makes the body hungry

Tags

NGSS.MS-LS2-3

Which of the following organs is primarily responsible for nutrient absorption in the digestive system?

• Stomach

• Small intestine

• Large intestine

• Esophagus

Tags

NGSS.MS-LS1-7

What is the main function of the stomach in the digestive system?

• Absorption of nutrients

• Production of bile

• Mechanical and chemical digestion

• Storage of waste

Which enzyme is responsible for breaking down proteins in the stomach?

• Amylase

• Lipase

• Pepsin

• Lactase

Tags

NGSS.MS-LS1-7

What is the role of bile in the digestive system?

• Neutralizes stomach acid

• Breaks down carbohydrates

• Emulsifies fats

• Digests proteins

Which part of the digestive system is responsible for water absorption?

• Stomach

• Small intestine

• Large intestine

• Pancreas