3.5 Molluscs

• Biologie
• Middelbare school
• vwo
• Leerjaar 1

Welcome everyone!

Today:

Throwback previous paragraphs 

Questions about homework?

Discussing paragraph 3.5 (TB page 64)

Making homework 

What types of worms are there?

Which type of worm is the most common in soil?

Which type of worm is known to be parasitic?

Can you name an example of a cnidarian?

Which asymmetrical phylum have we already discussed in the past weeks?

What are we going to learn today?

Today we are going to learn:

What molluscs are.

What characterises molluscs. 

What gills and lungs are. 

How molluscs feed themselves. 

Molluscs

Molluscs (weekdieren) soft animals, which are characterized by their shell. Other characteristics are that they have a mantle and muscular feet for movement. 

The bivalves (shell animals), squids, octospusses, slugs and snails are all part of this phylum. 

Molluscs

Like a lot of other sea animals we have discussed, molluscs often feed themselves by filtering the water. However, there are some molluscs that are predators. 

Octopus and squid

Gills and lungs

Molluscs have a proper respiratory system, but they are built different within the group. Some molluscs have gills where others have lungs. 

Get to work!

The homework for next lesson will be exercises 24 through 30. You can start to work in it now. You can use this image for exercise 29.