Transcript Diapositiva 1

UNIT
2
The nutrition function
AUTOTROPHIC AND
HETEROTROPHIC PLANT CELLS
Natural Science 2. Secondary Education
UNIT
2
Autotrophic and heterotrophic plant cells
• Plants, as you know, are
autotrophic organisms, which
means they produce their own food
from inorganic matter.
• However, as multicellular
organisms, they have both
autotrophic and heterotrophic cells.
Natural Science 2. Secondary Education
UNIT
2
Autotrophic and heterotrophic plant cells
Autotrophic plant cells
• Autotrophic cells are found in the green parts of plants, like
the leaves and stems, which contain chloroplasts, where
photosynthesis is carried out.
The cells of this leaf are autotrophic because they contain chloroplasts, which is
where photosynthesis is carried out.
Natural Science 2. Secondary Education
UNIT
2
Autotrophic and heterotrophic plant cells
Heterotrophic plant cells
• Heterotrophic cells cannot make organic matter by
themselves because they do not have chloroplasts.
• These cells obtain their nutrients from the phloem sap that is
made in the plant’s autotrophic cells.
• Heterotrophic cells are found in the non-green parts of plants,
like roots and woody stems.
Root hair cells do not
carry out photosynthesis, so they are
heterotrophic.
Natural Science 2. Secondary Education