Intro to Frog Dissection

Miss Colabelli

Directional Terms

• 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• Proximal = point of origin• Distal = away from origin• Superficial =

external/surface• Deep = internal/beneath

surface

Regional Terms

• Cephalic = head• Frontal = forehead• Orbital = eye• Nasal = nose• Buccal = Cheek• Occipital = base of

skull

Regional Terms

• 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!