Plants play several important roles in sustaining life on Earth. They produce food for humans and animals, regulate the water cycle through transpiration, provide clothing materials like cotton, produce oxygen through photosynthesis, and are used as medicines. The main functions of plants are to produce food, regulate water and air quality, and provide resources like clothing and medicine to other living organisms.

1. July 2018
SU LOGOTIPO
The region of the
stem where leaves
are born are
called nodes while
internodes are the
portions between
two nodes.
Some stems
perform the
function of storage
of food, support,
protection and of
vegetative
propagation.
Plant Parts
C E. Guillermo Endara Galimany
English Department
Science
Topic #1
Level:
Third
Teacher Dina Avila
Conclusion
Plants are essential part of life on
the Earth. They play an important
role in the lives of animals as well
as in humans. There are several
different ways in which plant play
their roles in sustenance of life on
everyday basis. Food:Plants pro-
vide food to humans as well as
animals.Plants prepare their food
themselves but plants are used by
other living beings for food pur-
pose. Water: Plants regulate the
water cycle.They move water from
soil to atmosphere through a pro-
cess called transpiration. Clothes:
Plants like cotton provide us clot-
hes to wear Oxygen:Plants absorb
carbon dioxide and release
oxygen in the air that is used by
all living beings for breathing.
Medicines: Several plants are
used for medicinal purpose.Aloe
vera ,Tulsi are few examples

2. The region of the stem where leaves are born
are called nodes while internodes are the
portions between two nodes.
Some stems perform the function of storage
of food, support, protection and of
vegetative propagation.
Underground stems of potato, ginger, turmeric,
zaminkand, colocasia are modified to
store food in them.
Stem tendrils which develop from axillary buds,
are slender and spirally coiled and help
plants to climb such as in gourds
(cucumber, pumpkins, watermelon) and
grapevines.
Axillary buds of stems may also get modified
into woody, straight and pointed thorns.
Thorns are found in many plants such as
Citrus, Bougainvillea. They protect plants
from browsing animals.
Some plants of arid regions modify their stems
into flattened (Opuntia), or fleshy
cylindrical (Euphorbia) structures. They
contain chlorophyll and carry out
photosynthesis.
Underground stems of some plants such as
grass and strawberry, etc., spread to new niches
and when older parts die new plants are formed.
Plant Parts and Their Functions –
Structural Organization in Plants
The main functions of the root sys-
tem are absorption of water
and minerals from the soil,
providing a proper anchorage
to theroots. The primary roots
and its branches constitute
the tap root system, as seen in
the mustard plant.
In monocotyledonous plants, the
primary root is short lived and
is replaced by a large number
of roots. These roots originate
from the base of the stem and
constitute the fibrous root sys-
tem, as seen in the wheat plant.
plant parts, storing reserve food
material and synthesis of plant
growth regulators.
In majority of the dicotyledonous
plants, the direct elongation of
the radicle leads to the for-
mation of primary root which
grows inside the soil. It bears
lateral roots of several orders
Leyenda que describe la imagen o el gráfico
Index
• Identify Parts of A Plant
• Job of the Roots
• Importance of the Stem
• Why do Plants Have Leaves
• Photosynthesis
• The Flower
• Plants Importance to Our
Habitat
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