Do Now
List and describe 3 organ systems in the
human body.
Write your answer in your science journal.
Big Picture
LS1.A: Structure and Function
All living things are made up of cells, which is
the smallest unit that can be said to be alive.
An organism may consist of one single cell
(unicellular) or many different numbers and
types of cells (multicellular).
•Objectives:
List three functions of roots and three functions of stems.
Describe the structure of a leaf.
Identify the parts of a flower and their functions.
Learning Target

Today I will: learn about the parts
of a plant

So that I can: begin to see the
similarities of plant and animal
organization.

I will know I got it if: compare
and contrast properties and
functions of plant and animal
systems.
Vocabulary
Agenda

xylem

phloem

Today we will:

root

Watch a video

stem

Teacher presentation.

leaf

Group and individual work

stamens

Exit Ticket.

pistils
Video

https://www.youtube.com/watch?v=PhRiKU6nYk0
•There are two types of vascular tissue in plants:
• Xylem is the type of tissue in vascular
plants that provides support and conducts
water and nutrients from the roots.
• Phloem is the tissue that conducts food in
vascular plants.
•Visual Concept
Roots
• Root Functions The following are the main
functions of roots:
• Roots supply plants with water and dissolved
minerals.
• Roots hold plants securely in the soil.
• Roots store surplus food made during
photosynthesis
Roots, continued
• Root Structure The layers of cells that cover the
surface of the roots is called the epidermis.
• After water and minerals are absorbed by the
epidermis, they diffuse into the center of the root
where the vascular tissue is located.
•A root cap can be found at the end of the root. The
root cap protects the tip and helps the root continue
to grow.
Stems
•Stem Functions A stem connects a plant’s roots to its
leaves and flowers. A stem also has the following
functions:
•Stems support the plant body.
•Stems transport materials between the root system
and the shoot system.
•Some stems store materials.
Stems continued…
•Woody Stems Trees and shrubs have rigid
stems made of wood and bark. These stems
are called woody stems.
Leaves
• Leaf Functions The main function of leaves is to
make food for the plant.
• Leaf Structure The structure of leaves, shown on the
next slide, is related to their main function—
photosynthesis.
Leaves, continued
• Leaf Adaptations Some leaves have functions other
than photosynthesis.
•The leaves of many cactuses are modified as spines.
These spines keep animals from eating the cactuses.
• The leaves of sundews are modified to catch insects,
which the sundew digests.
Flowers
• Flowers are adaptations for sexual
reproduction.
• Sepals and Petals The modified leaves that
make up the outermost ring of flower parts and
protect the bud are called sepals.
• Petals are broad, flat, thin leaflike parts of a
flower.
Flowers, continued
• Stamens and Pistils The male reproductive
structure of a flower is called a stamen.
• A Pistil is the female reproductive structure of a
flower.
Flowers, continued
• The Importance of Flowers Flowers help plants
reproduce.
• Humans use flowers for arrangement. Flowers are also
used to make spices, perfumes, and lotions.
• Broccoli, cauliflower, and artichokes are flowers that
people eat. Chamomile and hibiscus flowers are used to
make tea.
Exit Ticket