2.2.1 The Human Digestive System

• The stomach digests proteins and kills bacteria.


  True
• The liver produces bile, which aids in fat digestion
• Stages of the digestive system in order

  1️⃣ Ingestion

  2️⃣ Digestion

  3️⃣ Absorption

  4️⃣ Elimination
• Digestion involves both mechanical and chemical processes.


  True
• Absorption is the process of moving nutrients into the bloodstream
• Match the stage of digestion with its description:

  Ingestion ↔️ Taking food into the mouth

  Mechanical Digestion ↔️ Physical breakdown of food

  Chemical Digestion ↔️ Breakdown of food molecules with enzymes

  Absorption ↔️ Transferring nutrients into the bloodstream

  Elimination ↔️ Removing undigested waste
• Mechanical digestion begins in the mouth
• Which organ secretes digestive enzymes?

  Pancreas
• What is the primary function of ingestion in the digestive system?

  Taking food into the body
• Absorption in the digestive system involves moving nutrients into the bloodstream.


  True
• The mouth starts both mechanical and chemical digestion by chewing and breaking down food
• The stomach digests proteins and kills bacteria using gastric juices.


  True
• What does the large intestine absorb from indigestible material?

  Water and electrolytes
• Stages of the digestive process from ingestion to elimination

  1️⃣ Ingestion

  2️⃣ Digestion

  3️⃣ Absorption

  4️⃣ Elimination
• Mechanical digestion increases the surface area of food, allowing digestive enzymes to work more effectively.
• Fat-soluble nutrients are absorbed directly into the bloodstream.

  False
• What is the primary function of the human digestive system?

  Breaks down food
• The mouth starts both mechanical and chemical digestion
• Which organ absorbs nutrients into the bloodstream?

  Small intestine
• The pancreas secretes digestive enzymes.


  True
• Ingestion is the process of taking food into the body
• What is the process of moving nutrients into the bloodstream called?

  Absorption
• The mouth starts mechanical and chemical digestion.

  True
• What is the rhythmic contraction of muscles in the esophagus called?

  Peristalsis
• The mouth starts both mechanical and chemical digestion.

  True
• Match the organ with its function:

  Mouth ↔️ Starts mechanical and chemical digestion

  Esophagus ↔️ Transports food to the stomach

  Stomach ↔️ Digests proteins and kills bacteria

  Small Intestine ↔️ Absorbs nutrients into the bloodstream

  Large Intestine ↔️ Absorbs water and electrolytes
• The process of breaking down food into smaller molecules is called digestion
• What is the purpose of elimination in the digestive system?

  Removing undigested waste
• Which organ transports food from the mouth to the stomach?

  Esophagus
• The small intestine absorbs the majority of nutrients from digested food into the bloodstream
• Match the digestive organ with its function:

  Liver ↔️ Produces bile

  Pancreas ↔️ Secretes digestive enzymes

  Small Intestine ↔️ Absorbs most nutrients
• Peristalsis in the esophagus helps break down food mechanically.

  True
• Which enzyme in the stomach digests proteins?

  Pepsin
• What are examples of water-soluble nutrients absorbed directly into the bloodstream?

  Glucose and amino acids
• Digestive enzymes are essential for breaking down food molecules into absorbable nutrients.

  True
• What is the function of the esophagus in the digestive system?

  Transports food to stomach
• The small intestine is where most nutrients are absorbed into the bloodstream.


  True
• The process of moving nutrients into the bloodstream is called absorption
• What is the rhythmic contraction of muscles that helps move food through the esophagus called?

  Peristalsis
• The small intestine absorbs nutrients using structures called villi and microvilli