B3-Organisation and the Digestive System

Question 1

What is a tissue?

Answer 1

A group of cells with similar structure and function working together.

Question 2

What is an organ?

Answer 2

A collection of several tissues all working together to perform a specific function.

Question 3

What is an organ system?

Answer 3

A group of organs that all work together for specific functions. Organ systems in the human body include the digestive system and circulatory system.

Question 4

What is the digestive system?

Answer 4

A muscular tube that squeezes your food through it. It starts at the mouth and finishes at the anus. The system contains many organs that help digest food, often by enzymes released from glands

Question 5

How does digestion start in the mouth?

Answer 5

• Teeth and tongue work together to chop food to smaller pieces.
• This increases surface area that the enzymes can work on.
• Enzymes in the saliva breaks down starch into simple sugars and the saliva also makes it easier to swallow.

Question 6

How does the oesophagus help digestion?

Answer 6

The oesophagus wall has muscles in it that contract behind food to push it down to the stomach (called peristalsis)