Download Body Cavities

PowerPoint® Lecture Slides
prepared by Vince Austin,
Bluegrass Technical
and Community College
CHAPTER
Elaine N. Marieb
Katja Hoehn
Human
Anatomy
& Physiology
SEVENTH EDITION
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
1
PART B
The Human
Body: An
Orientation
Anatomical Position

Body erect, feet slightly
apart, palms facing
forward, thumbs point
away from body
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Figure 1.7a
Directional Terms



Superior and inferior – toward and away from the
head, respectively
Anterior and posterior – toward the front and back
of the body
Medial, lateral, and intermediate – toward the
midline, away from the midline, and between a
more medial and lateral structure
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
Directional Terms


Proximal and distal – closer to and farther from the
origin of the body part
Superficial and deep – toward and away from the
body surface
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Directional Terms
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Table 1.1a
Directional Terms
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Table 1.1b
Regional Terms: Anterior View
Nasal (nose)
Frontal (forehead)
Orbital (eye)
Oral (mouth)
Buccal (cheek)
Cervical (neck)
Mental (chin)
(a) Anterior
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
Figure 1.7a
Regional Terms: Anterior View
Nasal (nose)
Frontal (forehead)
Orbital (eye)
Oral (mouth)
Buccal (cheek)
Cervical (neck)
Mental (chin)
Acromial
(point of shoulder)
Axillary (armpit)
Sternal
(breastbone)
Thoracic
(chest)
Mammary
(breast)
Abdominal
(abdomen)
Brachial (arm)
Antecubital
(front of elbow)
Antebrachial
(forearm)
Pelvic (pelvis)
Umbilical
(navel)
Carpal (wrist)
Pollex
(thumb)
Palmar
(palm)
Digital
(fingers)
(a) Anterior
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
Figure 1.7a
Regional Terms: Anterior View
Nasal (nose)
Frontal (forehead)
Orbital (eye)
Oral (mouth)
Buccal (cheek)
Cervical (neck)
Mental (chin)
Acromial
(point of shoulder)
Axillary (armpit)
Sternal
(breastbone)
Thoracic
(chest)
Mammary
(breast)
Abdominal
(abdomen)
Brachial (arm)
Antecubital
(front of elbow)
Antebrachial
(forearm)
Pelvic (pelvis)
Umbilical
(navel)
Carpal (wrist)
Pollex
(thumb)
Palmar
(palm)
Coxal
(hip)
Digital
(fingers)
Inguinal
(groin)
Pubic (genital region)
Femoral
(thigh)
Patellar
(anterior knee)
Fibular, or
peroneal
(side of leg)
Crural (leg)
Pedal
(foot)
Tarsal (ankle)
Digital (toes)
Hallux (great toe)
(a) Anterior
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Figure 1.7a
Regional Terms: Posterior View
Otic (ear)
Cephalic
(head)
Occipital (back of
head or base of skull)
(b) Posterior
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Figure 1.7b
Regional Terms: Posterior View
Otic (ear)
Cephalic
(head)
Occipital (back of
head or base of skull)
Acromial
(point of shoulder)
Vertebral
(spinal column)
Scapular
(shoulder blade)
Brachial (arm)
Dorsum or dorsal
(back)
Olecranal
(back of elbow)
Lumbar (loin)
Sacral
(between hips)
Upper
extremity
Manus
(hand)
(b) Posterior
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Figure 1.7b
Regional Terms: Posterior View
Otic (ear)
Cephalic
(head)
Occipital (back of
head or base of skull)
Acromial
(point of shoulder)
Vertebral
(spinal column)
Scapular
(shoulder blade)
Brachial (arm)
Dorsum or dorsal
(back)
Olecranal
(back of elbow)
Lumbar (loin)
Sacral
(between hips)
Upper
extremity
Manus
(hand)
Gluteal (buttock)
Perineal
(region between
the anus and
external genitalia)
Femoral (thigh)
Lower
extremity
Popliteal
(back of knee)
Sural (calf)
Calcaneal (heel)
Plantar (sole)
(b) Posterior
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Figure 1.7b
Body Planes





Sagittal – divides the body into right and left parts
Midsagittal or medial – sagittal plane that lies on
the midline
Frontal or coronal – divides the body into anterior
and posterior parts
Transverse or horizontal (cross section) – divides
the body into superior and inferior parts
Oblique section – cuts made diagonally
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Body Planes
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
Figure 1.8
Anatomical Variability

Humans vary slightly in both external and internal
anatomy

Over 90% of all anatomical structures match
textbook descriptions, but:


Nerves or blood vessels may be somewhat out of
place

Small muscles may be missing
Extreme anatomical variations are seldom seen
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
Body Cavities

Dorsal cavity protects the nervous system, and is
divided into two subdivisions



Cranial cavity – within the skull; encases the brain
Vertebral cavity – runs within the vertebral
column; encases the spinal cord
Ventral cavity houses the internal organs (viscera),
and is divided into two subdivisions

Thoracic

Abdominopelvic
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
Body Cavities
Cranial cavity
(contains brain)
Thoracic
cavity
(contains
heart
and lungs)
Dorsal
body
cavity
Diaphragm
Vertebral cavity
(contains spinal
cord)
Abdominal cavity
(contains digestive
viscera)
Key:
Pelvic cavity
(contains bladder,
reproductive organs,
and rectum)
Dorsal body cavity
Ventral body cavity
(a) Lateral view
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
Figure 1.9a
Body Cavities
Key:
Cranial
cavity
Dorsal body cavity
Ventral body cavity
Vertebral
cavity
Thoracic
cavity
(contains
heart
and lungs)
Superior
mediastinum
Pleural
cavity
Pericardial
cavity within
the mediastinum
Diaphragm
Abdominal cavity
(contains digestive
viscera)
Abdominopelvic
cavity
Ventral
body cavity
(thoracic
and
abdominopelvic
cavities)
Pelvic cavity
(contains bladder,
reproductive organs,
and rectum)
(b) Anterior view
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
Figure 1.9b
Body Cavities

Thoracic cavity is subdivided into two pleural
cavities, the mediastinum, and the pericardial
cavity



Pleural cavities – each houses a lung
Mediastinum – contains the pericardial cavity;
surrounds the remaining thoracic organs
Pericardial cavity – encloses the heart
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
Body Cavities

The abdominopelvic cavity is separated from the
superior thoracic cavity by the dome-shaped
diaphragm

It is composed of two subdivisions


Abdominal cavity – contains the stomach,
intestines, spleen, liver, and other organs
Pelvic cavity – lies within the pelvis and contains
the bladder, reproductive organs, and rectum
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
Ventral Body Cavity Membranes

Parietal serosa lines internal body walls

Visceral serosa covers the internal organs

Serous fluid separates the serosae
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Serous Membrane Relationship
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Figure 1.10a
Heart Serosae
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Figure 1.10b
Other Body Cavities

Oral and digestive – mouth and cavities of the
digestive organs

Nasal –located within and posterior to the nose

Orbital – house the eyes


Middle ear – contains bones (ossicles) that transmit
sound vibrations
Synovial – joint cavities
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Other Body Cavities
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Figure 1.13
Abdominopelvic Regions
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Figure 1.11a
Organs of the Abdominopelvic Regions
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Figure 1.11b
Abdominopelvic Quadrants

Right upper

Left upper

Right lower

Left lower
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings
Figure 1.12
Review Questions

When someone becomes dehydrated, we usually
feel thirsty, which causes us to drink fluids.
Decide whether the thirst sensation is part of a
negative or positive feedback control system and
defend your choice.

Mr. Harvey, a computer programmer, has been
complaining of numbness and pain in his right
hand. The nurse practitioner diagnosed his
problem as carpal tunnel syndrome and prescribe
use of a splint. Where will Mr. Harvey apply the
splint?
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings

Directional term review:

Distal: elbow/wrist

Lateral: hip bone/umbilicus

Superior: nose/chin

Anterior: toes/heel

Superficial: scalp/skull
Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings