cells
DESCRIPTION
For IGCSE O-Level Biology students Chapter 2TRANSCRIPT
CellsThe building blocks of
life
Animal and plant cellsAnimal cell Plant cell
Cell membrane
nucleus
cytoplasm
Cell wallcytoplasmSap vacuole
chloroplast
Nucleus
Cell membrane
Cell structuresAnimal cell
Plant cell
Comment
Cell membrane
Cytoplasm
Nucleus
Cell wall
Chloroplast
Sap Vacuole
present
present
present
present
present
present
present
present
absent
A membrane that holds the cell contents together, can
control what goes in and out of the cell
absent
Jelly-like substance where all chemical reactions take placeControls the cell activities, contains the DNA
A rigid substance made of cellulose that keeps the cell’s shape fixedContains chlorophyll,
can carryout photosynthesis
A place where the cell may store food or wastes
absent
present
Pictures of different cells:
Name of cell Red blood cells
Cell’s function To transport oxygen from lungs to all body cells
Features present in cell that help it to carry out its function
1. Contain haemoglobin : that carries oxygen
2. Have no nucleus : to make more space for haemoglobin
3. Have biconcave shape : to increase surface area for absorption of oxygen
Drawing
Side view Top view
Name of cell Muscle cells
Cell’s function To move part of the body
Features present in cell that help it to carry out its function
Have contractile fibers that can shorten to produce movement
Drawing
Name of cell Ciliated cells
Cell’s function To sweep away dust and bacteria in air
Features present in cell that help it to carry out its function
1. Have short hairs (cilia) that move to sweep mucus out of the respiratory tract
Drawing
Name of cell Palisade cells
Cell’s function To change light energy to chemical energy (food)
Features present in cell that help it to carry out its function
1. Have chloroplasts containing green chlorophyll that can carry out photosynthesis
Drawing
Name of cell Xylem cells
Cell’s function Transport water and minerals up the plant
Features present in cell that help it to carry out its function
1. Have no cell contents 2. Have no end walls to create long
hollow tubes3. Walls are lined with a tough
substance called lignin
Drawing
Name of cell Root hair cells
Cell’s function Absorb water and minerals from the soil
Features present in cell that help it to carry out its function
1. Has a long protrusion to increase the surface area of absorption.
Drawing