Download Tissues - ScienceWithMrShrout

Organization of Life
Levels of Organization
• The different branches of biology can be
classified based on different levels of
complexity
• Each “level” is made up of smaller component,
and usually contributes to a larger system.
Levels- smallest to biggest
1. Molecules- groups of atoms; the smallest
unit of most chemical compounds
2. Cells- smallest functional unit of life. Basic
units of structure and function.
3. Tissues- composed of specialized cells which
perform a specific function
– Ex. Blood, muscle, nerve
Levels of Structural Organization
Molecules
Atoms
Chemical level
Atoms combine to
form molecules
Figure 1.1, step 1
Levels of Structural Organization
Smooth muscle cell
Cellular level
Cells are made up of
molecules
Molecules
Atoms
Chemical level
Atoms combine to
form molecules
Figure 1.1, step 2
Levels of Structural Organization
Smooth muscle cell
Cellular level
Cells are made up of
molecules
Smooth
muscle
tissue
Molecules
Atoms
Chemical level
Atoms combine to
form molecules
Tissue level
Tissues consist of
similar types of cells
Figure 1.1, step 3
Levels- smallest to biggest
4. Organs- groups of specialized tissues that
perform a specific function
– Ex. Heart, brain, liver, skin
5. Organ Systems- consist of different organs
that work together to perform a specific
function
– Ex. Digestive, nervous
6. Organism- any single multi-cellular living
thing
Levels of Structural Organization
Smooth muscle cell
Molecules
Cellular level
Cells are made up of
molecules
Atoms
Chemical level
Atoms combine to
form molecules
Tissue level
Tissues consist of
similar types of cells
Smooth
muscle
tissue
Epithelial
tissue
Smooth
Blood
muscle
vessel
tissue
(organ)
Connective
tissue
Organ level
Organs are made up
of different types
of tissues
Figure 1.1, step 4
Levels of Structural Organization
Smooth muscle cell
Molecules
Cellular level
Cells are made up of
molecules
Atoms
Chemical level
Atoms combine to
form molecules
Tissue level
Tissues consist of
similar types of cells
Smooth
muscle
tissue
Epithelial
tissue
Smooth
Blood
muscle
vessel
tissue
Cardio(organ)
Connective
vascular
tissue
system
Organ level
Organs are made up
Organ system level
of different types
Organ systems consist of different
of tissues
organs that work together closely
Figure 1.1, step 5
Levels of Structural Organization
Smooth muscle cell
Molecules
Cellular level
Cells are made up of
molecules
Atoms
Chemical level
Atoms combine to
form molecules
Tissue level
Tissues consist of
similar types of cells
Smooth
muscle
tissue
Epithelial
tissue
Smooth
Blood
muscle
vessel
tissue
Organismal level
Cardio(organ)
Connective
Human organisms
vascular
tissue
are made up of many
system
Organ level
organ systems
Organs are made up
Organ system level
of different types
Organ systems consist of different
of tissues
Figure 1.1, step 6
organs that work together closely
Getting Bigger…
• Population: Organisms of a species interact to
form a population
– Species: group of similar organisms that are
capable of interbreeding to produce fertile
offspring.
• Community: Populations of different species
that live together in an area create a
community.
• Ecosystem: The community and it’s non-living
environment make up an ecosystem.