Unit 2 Organs & Cells

• Biologie
• Middelbare school
• vwo
• Leerjaar 1

Unit 2: Organs & Cells

§2.1 The organs of animals

Organ

Part of an organism which performs a specific function

What is a function of the heart?

What is the function of the lungs?

Organ systems

A group of organs that work together

Respiratory system

Circulatory system

Skeletal system

Digestive system

Muscular system

Nervous system

Organs of dogs

Organs of grasshoppers

Organs of fish

Make §2.1

Exercise 1-3, 5, 7

Unit 2: Organs & Cells

§2 The organs of plants

What organs do plants have?

Roots

Take up water and minerals

Anchors a plant into the ground

Stores food reserves

Are divided in categories:

- Large central taproot

- Smaller lateral roots

- Tiny roothairs

Root system (tree)

Root system (tulip)

Taproot and lateral roots

Roothairs

Stems

Gives a plant its rigidity

Transports substances

Rigidity can be taken from presence of wood or from water

Woody plants

Herbaceous plants

Make §2.2

Assignment 1, 2, 6, 8

Name 2 functions of roots

Which part of the root system is used for taking up water and minerals?

1. Roothairs
2. Lateral roots
3. Taproots

Where do plants get their rigidity from (2 answers!)

Today

Leaves

Vascular system

What is the function of leaves?

Leaves

Carry out photosynthesis

Veins transport water and give the leaf rigidity

Vascular system

Used for transporting water and nutrients through the plant

Grouped together in a vascular bundle

All vessels in a plant together = vascular system

Make §2.2

Assignment 3, 4, 7, 9

Unit 2: Organs & Cells

§2.3 Tissues

This lesson

What are cells?

What are tissues?

Cells

'Building blocks' where organisms are made of

Different sizes & shapes

We (humans) are build up by cells

Groups of same cells --> tissues

Nerve cell

Bone tissue

Muscle tissue

Extracellular material

Cartilage cell

Extracellular 

material

What parts of your body are built from tissues?

Make §2.3

Exercise 1, 2, 6, 7, 8, 10

Unit 2: Organs & Cells

§2.4 Cells

What are tissues?

Extracellular material is a part of cells in tissues

True

False

This lesson

Parts of cells

Differences between plant and animal cells

Cheek lining cell

Schematic cheek lining cell

Waterweed cells

Schematic plant cell

Plastids

Chloroplasts

Chromoplasts

Amyloplasts

Plastids

Chloroplasts

Chromoplasts

Amyloplasts

Plastids

Chloroplasts

Chromoplasts

Amyloplasts

(leucoplasts)

Differences between plant & animal cells?

Make §2.4

Homework Friday

Exercise 1-7, 10

Tomorrow

 Microscope: bring pencil, notebook & ruler