Transcript The Diversity of Cells

Is It Alive???
Alive???
Alive???
What makes something
living?
Characteristics of Living
Things
1. Are composed of cells.
2. They sense and respond to stimuli.
3. Homeostasis – maintain stable
internal conditions.
4. Reproduce – Sexual or asexual.
5. Display heredity.
6. Use energy.
7. Grow and develop.
Review pages 38-41
Are viruses alive???
What do living things
need?
• Water
• Air
• A Place to Live
• Food – producer, consumer,
decomposer – They all need to
make compounds.
Essential Compounds
• Proteins – build & repair body
structures, regulate body processes.
• Carbohydrates – made of sugars,
provide energy.
• Lipids – Some store energy, also
form cell membranes.
• ATP – major energy carrying
molecule. Energy currency in the
body.
• Nucleic Acids – How-to manuals.
Are these compounds
alive???
• Proteins – build & repair body
structures, regulate body processes.
• Carbohydrates – made of sugars,
provide energy.
• Lipids – Some store energy, also
form cell membranes.
• ATP – major energy carrying
molecule. Energy currency in the
body.
• Nucleic Acids – How-to manuals.
Cells, Cell
Theory, &
Organelles
Robert Hooke
• Is credited as the first
person to describe
cells.
• He could not see
animal cells (because
they’re smaller).
What is this from?
Matthias Schleiden
• Studying plant cells, he concluded that all
plant parts were made up of cells.
Human Cheek Cell
Human Cheek Cell
Theodor Schwann
• Studied animals.
• Concluded that all animal tissues were
made of cells.
Human Skin
Do all human cells look the same?
Muscle, Tendon, Lung,
Nervous Tissue
Blood Cells from SEM
Cell Theory
• All organisms are made of one or more
cells.
• The cell is the basic unit of all living things.
• All cells come from existing cells.
Homework
• Read pgs 60-67, The Diversity
of Cells
• Take notes