Characteristics of Living Things. Characteristics of Living Things… Made up of cells Metabolism...
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Transcript of Characteristics of Living Things. Characteristics of Living Things… Made up of cells Metabolism...
Characteristics of Living Things
Characteristics of Living Things…
• Made up of cells• Metabolism
• Respiration, Nutrition, Digestion, Excretion
• Circulation• Definite form and size• Growth• Locomotion• Response to stimuli• Adaptation to change• Reproduction• Definite life span
Big things are often made up of smaller parts
Different kinds of lliittttllee ppeeiicceess or units make up different parts of a
whole
Living things
are made up of cells
light microscope scanning electron microscope
Cells Tissues Organs Systems
Cell:Osteocyte
(student)
Tissue:Bone tissue
(class)
Organ:Bone
(grade)
Organ system:Skeletal system
(school)
Metabolism:Respiration
Cells need oxygen and energy
Cells take oxygen (O2) from their surrounding
Cells also take glucose (C6H12O6) from their surrounding
Cells release carbon dioxyde (CO2) into their surrounding and
ENERGY
This process is called RespirationO2 + C6H12O6 CO2 + H2O + energy
Because of cellular respiration,
living organisms give off waste products through a process called excretion.excretion.
O2
C6H12O6
CO2
Because each and every cell in an organism depends on respiration and
excretion,
That organism must have some sort of circulationcirculation system in place to bring
each cell what it needs, and carry away its waste products
Delivery Pickup
When an organism is at rest, it needs less energy.
Therefore its metabolism, (respiration and excretionexcretion) and
circulation are slow.
When an organism is at work, it needs more energy.
Therefore its metabolism,
(respiration and excretionexcretion) and circulation are fast.
Each kind of living thing has a definite size and shape which helps us
recognise it.
All living things grow in size, and repair or replace worn out cells in
the body
Living things move (at least parts of their bodies) around by
themselves,
Living things react to things in their surrounding and adapt to change
XX
Living things grow for a certain time, reproduce, make sure their young survive, grow old and then
die.
Review: Why Not?
1) Is everything in this picture that moves alive?
3) Ice melts when it is taken out of the freezer, as it reacts to changes in its environment. Why don’t we say the ice is alive?
2) The print on a page can be reproduced by a photocopying machine. Why don’t we say the machine is alive?
