Internal fish anatomy - digestive system

Question 1

Functions of digestive system

Answer 1

→ It eliminates materials that are not used.
→ The digestive process is completed in the intestines. The digested food enters the bloodstream.
→ Waste products and undigested food pass out through the vent.

Question 2

Where does the digestive system start and ends?

Answer 2

• mouth to vent

Question 3

What does a mouth of a jaw fish look like? + function

Answer 3

• most fish have a jawed mouth with a tongue and teeth. They use their teeth to seize prey or to tear off pieces of their victim’s flesh.

Question 4

What is the process of swallowing food ?

Answer 4

• food passes through the pharynx on the way to the oesophagus. A fish’s oesophagus expands easily, which allows the fish to swallow its food whole.
• Some fish have their oesophagus or stomach enlarged into a gizzard. The gizzard grinds food into small pieces before it passes into the intestines.

Question 5

Where does the food go from the oesophagus?

Answer 5

• from the oesophagus, food passes into the stomach, where it is partly digested.