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PowerPoint® Lecture Slide Presentation
by Patty Bostwick-Taylor,
Florence-Darlington Technical College
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
PART A1
The Human Body:
An Orientation
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
The Human Body—An Orientation
Anatomy
Study of the structure and shape of the body
and its parts
Physiology
Study of how the body and its parts work or
function
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Anatomy—Levels of Study
Gross anatomy
Large structures
Easily observable
Figure 14.1
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Anatomy—Levels of Study
Microscopic Anatomy
Very small
structures
Can only be
viewed with
a microscope
Figure 14.4c–d
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Levels of Structural Organization
Figure 1.1
Smooth muscle cellMolecules
Atoms
Smooth
muscle
tissue
Epithelial
tissue
Smooth
muscle
tissue
Connective
tissue
Blood
vessel
(organ) Cardio-
vascular
system
Cellular level
Cells are made up of
molecules
Tissue level
Tissues consist of
similar types of cells
Organ level
Organs are made up
of different types
of tissues
Organ system level
Organ systems consist of different
organs that work together closely
Organismal level
Human organisms
are made up of many
organ systems
Chemical level
Atoms combine to
form molecules
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Levels of Structural Organization
Figure 1.1, step 1
Molecules
Atoms
Chemical level
Atoms combine to
form molecules
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Levels of Structural Organization
Figure 1.1, step 2
Smooth muscle cellMolecules
AtomsCellular level
Cells are made up of
molecules
Chemical level
Atoms combine to
form molecules
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Levels of Structural Organization
Figure 1.1, step 3
Smooth muscle cellMolecules
Atoms
Smooth
muscle
tissue
Cellular level
Cells are made up of
molecules
Tissue level
Tissues consist of
similar types of cells
Chemical level
Atoms combine to
form molecules
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Levels of Structural Organization
Figure 1.1, step 4
Smooth muscle cellMolecules
Atoms
Smooth
muscle
tissue
Epithelial
tissue
Smooth
muscle
tissue
Connective
tissue
Blood
vessel
(organ)
Cellular level
Cells are made up of
molecules
Tissue level
Tissues consist of
similar types of cells
Organ level
Organs are made up
of different types
of tissues
Chemical level
Atoms combine to
form molecules
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Levels of Structural Organization
Figure 1.1, step 5
Smooth muscle cellMolecules
Atoms
Smooth
muscle
tissue
Epithelial
tissue
Smooth
muscle
tissue
Connective
tissue
Blood
vessel
(organ) Cardio-
vascular
system
Cellular level
Cells are made up of
molecules
Tissue level
Tissues consist of
similar types of cells
Organ level
Organs are made up
of different types
of tissues
Organ system level
Organ systems consist of different
organs that work together closely
Chemical level
Atoms combine to
form molecules
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Levels of Structural Organization
Figure 1.1, step 6
Smooth muscle cellMolecules
Atoms
Smooth
muscle
tissue
Epithelial
tissue
Smooth
muscle
tissue
Connective
tissue
Blood
vessel
(organ) Cardio-
vascular
system
Cellular level
Cells are made up of
molecules
Tissue level
Tissues consist of
similar types of cells
Organ level
Organs are made up
of different types
of tissues
Organ system level
Organ systems consist of different
organs that work together closely
Organismal level
Human organisms
are made up of many
organ systems
Chemical level
Atoms combine to
form molecules
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Necessary Life Functions
Metabolism—chemical reactions within the body
Produces energy
Makes body structures
Movement
Locomotion
Movement of substances
Responsiveness
Ability to sense changes and react
Growth
Increases cell size and number of cells
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Necessary Life Functions
Reproduction
Produces future generation
Respiration
Obtaining oxygen, removing carbon dioxide,
and releasing energy from foods.
Digestion
Break-down and absorption of nutrients
Absorption
Passage of substances through membranes
into body fluids
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Necessary Life Functions
Circulation
Movement of substances in body fluids
Assimilation
Changing absorbed substances into
chemically different forms
Excretion
Eliminates waste from metabolic reactions
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Interrelationships Among Body Systems
Figure 1.3
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Survival Needs
Food
Chemicals for energy and cell building
Includes carbohydrates, proteins, lipids,
vitamins, and minerals
Oxygen
Required for chemical reactions
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Survival Needs
Water
60–80% of body weight
Provides for metabolic reaction
Circulation
Maintain body temperature
Stable body temperature
Atmospheric pressure
Must be appropriate
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Homeostasis
Homeostasis—maintenance of a stable internal
environment
A dynamic state of equilibrium
Homeostasis is necessary for normal body
functioning and to sustain life
Homeostatic imbalance
A disturbance in homeostasis resulting in
disease
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Feedback Mechanisms
Negative feedback
Includes most homeostatic control
mechanisms
Shuts off the original stimulus, or reduces its
intensity
Works like a household thermostat
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Feedback systems Cycle of events in which the status of a body
condition is continually monitored, evaluated, changed, re-monitored, reevaluated, and so on…..
5 components – stimulus, receptor, control center, effector, response
Stimulus – a change occurs in the environment
Receptor monitors changes and inputs info (nerve endings)
Control center determines the “normal” range, evaluates detected changes and outputs commands (brain)
Effector is the body structure that receives output from control center and produces a response (sweat glands)
Response is produced by effector
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Figure 1.4
Change
detected
by receptor
Stimulus:
Produces
change
in variable
Input:
Information
sent along
afferent
pathway to
Receptor (sensor) Effector
Variable(in homeostasis)
Response of
effector feeds
back to
influence
magnitude of
stimulus and
returns variable
to homeostasis
Control
centerOutput:
Information sent
along efferent
pathway to activate
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Figure 1.4, step 1a
Variable(in homeostasis)
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Figure 1.4, step 1b
Stimulus:
Produces
change
in variableVariable
(in homeostasis)
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Figure 1.4, step 2
Change
detected
by receptor
Stimulus:
Produces
change
in variable
Receptor (sensor)
Variable(in homeostasis)
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Figure 1.4, step 3
Change
detected
by receptor
Stimulus:
Produces
change
in variable
Input:
Information
sent along
afferent
pathway to
Receptor (sensor)
Variable(in homeostasis)
Control
center
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Figure 1.4, step 4
Change
detected
by receptor
Stimulus:
Produces
change
in variable
Input:
Information
sent along
afferent
pathway to
Receptor (sensor) Effector
Variable(in homeostasis)
Output:
Information sent
along efferent
pathway to activate
Control
center
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Figure 1.4, step 5
Change
detected
by receptor
Stimulus:
Produces
change
in variable
Input:
Information
sent along
afferent
pathway to
Receptor (sensor) Effector
Variable(in homeostasis)
Response of
effector feeds
back to
influence
magnitude of
stimulus and
returns variable
to homeostasis
Output:
Information sent
along efferent
pathway to activate
Control
center
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Maintaining Homeostasis
The body communicates through neural and
hormonal control systems
Receptor
Responds to changes in the environment
(stimuli)
Sends information to control center
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Maintaining Homeostasis
Control center
Determines set point
Analyzes information
Determines appropriate response
Effector
Provides a means for response to the
stimulus
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Feedback Mechanisms
Positive feedback
Increases the original stimulus to push the
variable farther
In the body this only occurs in blood clotting
and during the birth of a baby
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Figure 1.2a
Organ System Overview
Integumentary
Forms the external body
covering
Protects deeper tissue from
injury
Helps regulate body
temperature
Location of cutaneous
nerve receptors
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Figure 1.2b
Organ System Overview
Skeletal
Protects and supports
body organs
Provides muscle
attachment for movement
Site of blood cell
formation
Stores minerals
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Figure 1.2c
Organ System Overview
Muscular
Produces movement
Maintains posture
Produces heat
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Organ System Overview
Nervous
Fast-acting control
system
Responds to internal and
external change
Activates muscles and
glands
Figure 1.2d
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Organ System Overview
Endocrine
Secretes regulatory
hormones
Growth
Reproduction
Metabolism
Figure 1.2e
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Figure 1.2f
Organ System Overview
Cardiovascular
Transports materials in body
via blood pumped by heart
Oxygen
Carbon dioxide
Nutrients
Wastes
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Organ System Overview
Lymphatic
Returns fluids to blood
vessels
Cleanses the blood
Involved in immunity
Figure 1.2g
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Organ System Overview
Respiratory
Keeps blood supplied with
oxygen
Removes carbon dioxide
Figure 1.2h
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Organ System Overview
Digestive
Breaks down food
Allows for nutrient
absorption into blood
Eliminates indigestible
material
Figure 1.2i
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Organ System Overview
Urinary
Eliminates nitrogenous
wastes
Maintains acid-base
balance
Regulates water and
electrolytes
Figure 1.2j
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Organ System Overview
Reproductive
Produces
offspring
Figure 1.2k–l
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
What makes a living thing…..alive?
Metabolism-sum of all the chemical processes that occur in the body
Responsiveness-body’s ability to detect and respond to changes in its internal or external environment
Movement-motion of the whole body, individual organs, single cells, and even tiny organelles inside cells
Growth-increase in body size
Differentiation-process whereby unspecialized cells become specialized cells
Reproduction-formation of a new cell for growth, repair, or replacement or the production of a new individual.
Digestion- process of breaking down ingested food so it can be absorbed in the blood.
Excretion- process of removing wastes from the body
Reproduction-production of offspring.
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
The Language of Anatomy
Special terminology is used to prevent
misunderstanding
Exact terms are used for
Position
Direction
Regions
Structures
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Anatomical Terms
Anatomical position
Subjects stands erect
facing observer, with
the head level and the
eyes facing forward,
the feet are flat on the
floor and directed
forward, the arms are
at the sides with
palms turned forward.
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Figure 1.5a
Regional Terms
Anterior body landmarks
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Regional Terms
Posterior body landmarks
Figure 1.5b
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Directional Terms
Table 1.1 (1 of 3)
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Directional Terms
Table 1.1 (2 of 3)
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Directional Terms
Table 1.1 (3 of 3)
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Directional Terms
Superior-towards the head, or upper
portion of structure
Inferior-away from the head, or the
lower part of a structure
Anterior-nearer to or at the front of the
body
Posterior-nearer to or at the back of the
body
Medial-nearer to the midline or
midsagittal plane
Lateral-farther from the midline of
midsagittal plane
Intermediate-in between two structures Ipsilateral-on the same side of the body
as another structure
Contralateral-on the opposite sides of
the body from another structure
Proximal-nearer to the attachment of a
limb to the trunk, nearer to point of orgin
Distal-farther from the attachment of a
limb to the trunk, farther from origin
Superficial-toward the surface of the
body
Deep-away from the surface of the body
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Body Planes and Sections
A sagittal section divides the body (or organ) into
left and right parts
A median, or midsagittal, section divides the body
(or organ) into equal left and right parts
A frontal section divides the body (or organ) into
anterior and posterior parts
A transverse, or cross, section divides the body
(or organ) into superior and inferior parts
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Body Planes and Sections
Figure 1.6
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Body Planes and Sections
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Body Planes and Sections
Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings
Body Cavities
Dorsal body cavity
Cranial cavity houses the brain
Spinal cavity houses the spinal cord
Ventral body cavity
Thoracic cavity houses heart, lungs and
others
Abdominopelvic cavity houses digestive
system and most urinary system organs
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Body Cavities
Figure 1.7
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Body Cavities
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Body Cavities
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Abdominopelvic Quadrants
Figure 1.8a
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Abdominopelvic Regions
Figure 1.8b
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Abdominopelvic Major Organs
Figure 1.8c