Forensics New Content Flashcards
How many bones do adults have?
206
how many bones do babies have?
231
skull
cranium
lower jaw
mandible
collarbone
clavicle
sternum
middle of chest
spinal/backbone
vertebra
bone that aligns with thumb
ulna
hip bones distinguished by gender
pelvis
Other bones to know
humerus,radius,femu,tibla,fibula
Function of bones
1.Provide support for the body
2.Protect delicate organs(ribcage protects)
3.serve as a site for growth
Haversian canals
canals that blood vessels travel to reach each cell in the bone
Is the specimen human or animal bone?
presence of plexiform bone means animal
Biological Profile of Bone
Age of death
1.use of dentition(teeth)
2.Use of Long Bones
Use of dentition(teeth)
-1st incisors-9 months of age
-1st permanent-molars, erupt about 6yrs old
-wisdom teeth-between 17-21 yrs old
Use of long bones
-look at epipiphseal plate called metaphysics(growth area)
-still growing you see a plate gap
-after growing done, head and shaft fuse together you now do not see gap any more epiphyseal plate turns into a epiphseal line
Symphysis Pubis
(1) Young Adult-surface Is rough
(2) age 35-surface become higher and smoother and the rim develops
(3) Symphysis degenerates,surface begins to erode
-Gender
Triction ridges
raised portions of the outside layer of the skin that form rows that curve and loop across finger
dactyloscospy
science of comparing friction edges
dermis papillae
the layer of cells below the epidermis and the top of dermis
Gestation
8 weeks of gestation-fingerprint ridges begin to form
17th week of gestation finger prints are fully formed
Classification of Fingerprints
1.Latent Finger Prints-invisible fingerprints
2.Patent finger print-visible fingerprints
3.Plastic finger prints-3D impression
Visualization and Detection of Finger Print
1.Finger print Dusting
2. Reflected UV Imaging System
3.Chemical FingerPrinting
Chemical Finger Printing
1.Iodine Fuming-fatty acids of fingerprints residuals
2.silver nitrate-NaCI (AgNO3+NaCI) Reaction makes Ag+CI- AgCI(grayish finger print)
3.ninhydrin-amino acids of fingerprints residues-Ruhermann’s purple(100 C degrees)
4.Cyamoacrylate(super glue)-amino acids,protiens,fatty acids, of fingerprint residues(need moisture to speed up reaction) reaction a white precipitate
5.Fluorescence-Fluorescent dye(Rhodamine-6-G) to ayanacrylate
