1
Worksheet 1
Name and surnames: ..............................................................................................................................................................................................................................................
Year: ................................................................................................................................................... Date: ................................................................................................................
1. Name the numbered parts of the picture.
1
1.
2.
2
3.
3
5
4
4.
5.
2. Explain why human cells are eukaryotic animal cells.
...................................................................................................................................................................................................................................................................................................................................................................
A.
1. Ribosome
I. Carry out cellular digestion.
B.
2. Golgi
apparatus
II. Joins substances and uses
the vesicles to transport them
to different parts of the cell or
to remove them from the cell.
C.
3. Mitochondria
III. Make cell proteins.
D.
4. Endoplasmic
reticulum
IV. Produces proteins through the
ribosomes, which are found in
its membrane, and stores these
proteins or transports them to the
Golgi apparatus.
E.
5. Lysosome
V. Cellular respiration
takes place here.
6. Centrioles
VI. They direct chromosome
separation during cellular
reproduction and are involved in
the formation of structures that
cause cellular movements, such
as flagella.
F.
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3. Connect the picture of the cellular organelle with the name and the functions it carries out:
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4. Complete the table by marking the corresponding classification with an X:
Bioelement
Inorganic
biomolecule
Organic biomolecule
Minerals
Protein
Nucleic acid
Carbon
Oxygen
Carbohydrates
Water
Hydrogen
Lipid
5. Name the human tissues that are described below:
• Tissue that forms the outermost layer
of skin.
• Tissue that forms the glands.
• Tissue that contracts and produces movement
when responding to stimuli.
• Tissue that is mostly made up of neurons.
• Tissue that fills organs and the spaces
between them.
6. Complete the diagram:
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Connective tissues
Are classified into
.............. tissue
.............. tissue
which, for example, which, for example,
is found in
is found in
........... filling,
ligaments and
.......
.......... of the
ears, …………..,
joints ...
Adipose tissue
.............. tissue
.............. tissue
the cells of which
are called
which form
made up of
Osteocytes
................ and
blood cells
....................
....................
....................
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7. Name the systems represented in the following pictures:
1. .........................
2. .........................
3. .........................
4. .........................
5. .........................
6. ..................... 7. ..................... 8. ..................... 9. ..................... 10. ................... 11. ...................
8. Fill in the table and classify the systems from the previous activity according to the
function they are involved in.
Picture
System
Nutrition
Interaction
Reproduction
1
2
4
5
6
7
8
9
10
11
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Worksheet 2
Name and surnames: ..............................................................................................................................................................................................................................................
Year: ................................................................................................................................................... Date: ................................................................................................................
The functions of mitochondria
One of the organelles in our cells, the mitochondrion, has a very important function. It
carries out cellular respiration, which is the process through which the cell obtains all of
its energy.
Look at the ‘Cellular respiration’ presentation on the Anaya website and answer the following
questions:
1. What substances does the mitochondrion use to perform cellular respiration?
...................................................................................................................................................................................................................................................................................................................................................................
2. What products result from the process?
...................................................................................................................................................................................................................................................................................................................................................................
3. Where does the oxygen used by the mitochondrion come from?
...................................................................................................................................................................................................................................................................................................................................................................
4. The carbon dioxide produced as a waste product in cellular respiration must be expelled
by the body since it is a toxic waste product. Explain how the body expels this substance.
...................................................................................................................................................................................................................................................................................................................................................................
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5. Draw a diagram of the cellular respiration process and label the substances that the
mitochondrion uses, the resulting products and the waste products.
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Microphotography and cell size
Look at these images obtained using a microscope and answer the questions.
A
B
5 µm
1 µm
6. Write the names of the organelles and the cell structures that you recognise in picture A.
...................................................................................................................................................................................................................................................................................................................................................................
7. Name the cell structures and organelles that you can identify in picture B.
...................................................................................................................................................................................................................................................................................................................................................................
...................................................................................................................................................................................................................................................................................................................................................................
8. Using the scales found in each picture, calculate the size of the cells that you can see in
them and state whether they are similar in size (the size is similar if the difference is no
greater than 10 µm).
Approximate size of one of the cells in picture A: ........................................................................................................................
Approximate size of one of the cells in picture B: .........................................................................................................................
9. State the type of microscope that has been used to take each one of these
microphotographs. Explain your answer.
...................................................................................................................................................................................................................................................................................................................................................................
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10. What is the cause of the colour in picture A? What about picture B?
...................................................................................................................................................................................................................................................................................................................................................................
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