plants-nutrition-photosynthesis-and-respiration.pdf

PHOTOSYNTHESIS

1. Plants:
Nutrition,
Photosynthesis
and Respiration

2. Table of contents
01
Introduction
02
Parts of the plant. The root
03
Parts of the plant. The stem
04
Parts of the plant. Leaves
05
Plant nutrition: photosynthesis

3. 01
Introduction

4. Introduction
Plants are multicellular living
beings. They perform the
three vital functions:
●Nutrition
●Interaction
●Reproduction
The differences withthe rest of
living beingsare two:
No movement
They make their own food

5. 02
Parts of the
plant. The root

6. Parts of the plant. The root
The root.It is the
organ that lies
below the ground
and lacks leaves
It has two main functions
01Holding the plant to the ground
02Absorbing water and mineral salts in it
Curiosity of the roots
The roots can store nutrientsso that later the
stem and leaves can grow. By storing "food"
they thicken their roots (they become "fat")
and, at the same time, they are very
appetizing for humans
Examples of these edible roots are: carrots,
beets, turnips, onions, garlic, celery.... Yummy!

7. Parts of the plant. The root
The root has several parts
A thicker main part
It is the axis from which the secondary ones emerge
Secondary roots are branches of the main root
The purpose of the main root and secondary roots is to hold
the plant to the substratum and to transport water and
nutrients through the stem to the leaves, but they are not the
ones that absorb it
Root hairs
They are responsible for the absorption of water and nutrients
so that the plant can perform the function of nutrition
Root cap
It is the part that protects the root in the growing zone and is
usually found in the lower part of the plant

8. 03
Parts of the
plant. The stem

9. Parts of the plant. The stem
The stem. The
part of the plant
that is responsible
for holding and
transporting
water and other
mineral
substances to all
parts of the plant
Types of stems according to their hardness
Herbaceous stems are thin, flexible
and usually green in color. Herbs
have herbaceous stems
Woody stems are hard, stiff and usually
brown in color. Trees have a woody stem
called a trunk and their branches usually
grow at a certain height from the ground.
Shrubs also have a woody stem called a
trunk but it is shorter and their branches
are usually close to the ground
Like the root, it usually divides into secondary stems or branches,
from which the leaves, flowers and fruits arise.

10. 04
Parts of the
plant. Leaves

11. Parts of the plants. The leaves
Leaves. They arise
from the stem or
branches. They
are responsible for
photosynthesis,
respiration and
plant transpiration
The colors of the leaves
They have various colors,depending on
the pigment they contain. Those with the
most chlorophyll are green
Leaf shapes
There are many types: lanceolate,
elliptical, linear, obovate, oblong,
spathulate, rhomboid, reniform, and the list
goes on
Elliptical Linear Obovate

12. Parts of the plant. The leaves
The leaves have two parts
The lamina
The upper part is the adaxial faceand the lower part is
the abaxial face. At the center there is a midrib with
branches called veins
The adaxial face
The abaxial face
Veins
The petiole
Part where it joins the stem(there are
some that lack this part)

13. 05
Plant nutrition:
photosynthesis

14. Plant nutrition: photosynthesis
Plants are the only living things that produce their own food.They are called
autotrophs. This process is called photosynthesisand for this they need
water, mineral salts, carbon dioxide and sunlight
01
In the root, through the absorbent hairs, the plant
absorbs water and mineral salts from the soil
02The mixture of water and mineral salts is transport
by the xylem tissue until it reaches the leaves

15. Plant nutrition: photosynthesis
03
Leaves take carbon dioxide from the air. The
water and mineral salts mixture and carbon
dioxide, with the help of solar energy from light,
mix to form the plant's food
04Finally, the plant's food is distributed throughout
the plant by the phloem tissue