Cells & Tissues Flashcards
What are cells?
Cells are the building blocks of nature
Complete the sentence:
All plant and animal life is made up of…
Cells
Name 4 plant organs
Roots
Leaves
Flowers
Stems
Where is the cell wall and what is its purpose?
The cell wall contains the cell and can be found surrounding it
What is the cell wall made from?
Cellulose
Why is the cell wall permeable?
To allow gaseous exchange
What is the substance called that is added to woody plants as they grow, to make them thicker and more rigid?
Lignin
What is lignin?
A substance added to woody plants as they grow, to make them thicker and more rigid?
What is protoplasm?
The living contents of the cell.
This includes the cell embrace, cytoplasm, nucleus, vacuous, orangeries, (chloroplasts & mitochondria) & plasmodesmata
What is cell membrane?
What is its purpose?
A thin sheet within the cell.
It encloses the cyroplasm and controls the movement of substances in and out the cell
Name the Jelly like substance within a cell
Cytoplasm
What is cytoplasm?
A jellylike substance within the cell membrane
What is the nucleus?
The xonteol centre of the cell
What does the nucleus initiate?
Cell division
Where is cell division initiated?
In the nucleus
What is the vacuole?
A sac surrounded by its own membrane
What does a vacuole contain?
It’s own membrane, water, minerals, and waste products of the plant
How does the vacuole contribute to structural stability of the cell?
By the pressure of the liquid against the membrane
What is an orangelle?
Name two
Small bodies suspended in cytoplasm
Chloroplasts & mitochondria
What do chloroplasts contain?
They contain chlorophyll, giving plants their green colour
Where is mitochondria found?
In all parts of the plant
What are plasmodesmata?
What do they provide?
Strands of cyroplasm that pass through the cell walls and provide a connection of adjacent cells