Intro to
Frog Dissection
Miss Colabelli
Directional Terms
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Anterior (ventral) = front
Posterior (dorsal) = back
Superior (cranial) = Upper
Inferior (caudal) = Lower
Medial = midline
Medial
Directional Terms
• Lateral = away from midline
• Intermediate = between medial
and lateral
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Proximal = point of origin
Distal = away from origin
Superficial = external/surface
Deep = internal/beneath surface
Regional Terms
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Cephalic = head
Frontal = forehead
Orbital = eye
Nasal = nose
Buccal = Cheek
Occipital = base of
skull
Regional Terms
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Thoracic = chest cavity
Sternal = breast bone
Axillary = armpit
Brachial = arm
Regional Terms
• Carpal = wrist
• Digital = fingers/toes
• Vertebral = spinal
Body Planes
• Midsagittal – separates into
equal right and left portions
• Midline of the body
• Parasigittal – separates into
unequal right and left portions
Body Planes
• Frontal – parallel to axis
that separates body into
anterior and posterior
• Transverse – Separates
the body into superior
and inferior portions
• Oblique – separates the
body into diagonal
portions
Body Cavities
• Dorsal cavity – contains central nervous
system
• Cranial cavity – brain and spinal cord
• Ventral cavity – contains respiratory,
cardiac, digestive, urinary, and
reproductive organs
• Thoracic cavity – within rib cage, floor is
diaphragm (contains lungs and heart)
• Abdominopelvic cavity – occupies much
of lower front torso (contains stomach,
liver, spleen, kidneys, most of intestine,
urinary bladder, most of reproductive
system)
Lab Safety
• During dissection:
• WEAR GOGGLES AND GLOVES AT ALL TIMES!!
• Wear closed toes shoes
• Hair tied back
• Clothing is not hanging or loose (bring a t-shirt to throw over
clothes)
• To maintain a clean station, have one person in group be the
reader and recorder while the other dissects the frog
Cleaning Up
• Make sure your lab area is cleaned before leaving class
• To maintain freshness of your frog, wet a paper towel
and wrap the frog in it, place the wrapped frog into a
zip lock bag for the next day
• Rinse off all dissecting tools and DRY THEM
• Put all tools away and then remove gloves and goggles
• Wash your hands!