Download Language of Anatomy Anatomical Position Body erect, feet slightly

Language of Anatomy
Anatomical Position
Body erect, feet slightly
apart, palms facing
forward, thumbs point
away from body
Right, left, front, back,
top, bottom are the
subject’s (cadaver’s)
P.O.V. NOT the
observer’s.
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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
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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
The two fundamental divisions of our bodies are
its axial and appendicular parts.
Axial parts: head, neck, trunk
Appendicular parts: appendages (limbs) attached to
the axis (see Figure 1.7)
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Body Planes
A body plane is named for the plane along which it is cut
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
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Figure 1.8
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 cavity
Abdominopelvic cavity
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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
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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
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Figure 1.9b
Body Cavities
Thoracic cavity is enclosed by the ribs & muscles
of the chest
Thoracic cavity is subdivided into two pleural
cavities, the medial 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
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Body Cavities
The abdominopelvic cavity (inferior to the thoracic
cavity) is separated from the superior thoracic
cavity by the diaphragm
It is composed of two subdivisions
Abdominal cavity (superior portion) – contains the
stomach, intestines, spleen, liver, and other organs
Pelvic cavity (inferior portion)– lies within the
pelvis and contains the bladder, reproductive
organs, and rectum
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Ventral Body Cavity Membranes
Serosa (serous membrane) is a thin double-layered
membrane that covers the walls of the ventral body
cavity and the outer surfaces of the organs
Parietal serosa lines cavity walls. It folds in on
itself to form the visceral serosa
Visceral serosa covers the internal organs
Serous fluid separates the serosae and functions as
lubrication so organs can rub easily on each other
and inner side of cavity
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Serous Membrane Relationship
Fist (comparable to Heart)
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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
from Greek, literally, the parts under the
cartilage (of the breastbone),
From hypo- + chondros cartilage
Epi – lying upon or over
Hypo – inferior
Hyper - superior
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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
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Figure 1.12