Class Notes (837,346)
Canada (510,232)
Anthropology (1,678)
ANT100Y1 (964)
pfiffer (6)
Lecture

lec 2 ant334.docx

7 Pages
82 Views
Unlock Document

Department
Anthropology
Course
ANT100Y1
Professor
pfiffer
Semester
Fall

Description
lec 2 ant334 9/19/2012 7:12:00 AM Cartilage is a form of connective tissue in the body  Hyaline cartilage binds every synobial joints o Tough tissue, little ability to renewal  Fibrocartilage o Between vertebrae  Elastic cartilage o Least common  in ears (pinnae) Bone as a tissue: structure and chemical composition  Tuberculi spine  eaten away by virus villi (3 vertebrae fused  one wedged between 2)  In lab 20% water in bone is gone + lipid component is gone (bone afterlife no water no lipid it does have collagen protein and calcium phosphate hydroxyapatite) o Bone in life has a lot of fat in it o Protein in bone very important for ispotope analysis (what the person ate) and for o Inorganic part of bone: calcium phosphate hydroxyapatite is loose crystal accepts substitution easily (more easily than the other mineral in our body enamel (teeth)  Especially after death inorganic part still chemically active  Bone is like spider web /oak between flexible+weak and flexible and strong o Difficult to mimic Structural types of bone tissue(different types of bone)  Woven o Always transient o Only heals as a baby/or when healing  Cancellous/spongy/trabecular  all same thing BONE  Cortical/compact full of tiny little holes , more dense then spongy  Subchondralsits beneath a cartilage on a joint surface (chondra cartilage, cells that make cartilage chondrocytes)  Diploiccortical spongy cortical sandwhich  SKULL BONE Where does bone come from 2 pathways but bone is bone  Formed from cartilaginous template 1 o Endochondral(within cartilage template) ossification(to form bone) o Most of post cranial skeleton follows this pattern o Most dominant form + skeletal health  Formed directly from membrane o Intramembranous ossification o Most of skull o Clavicle Bone Growth  Fontanelles only in baby skulls  skull bones still have not joined o Just membrane o Trapezoid shape o Absence of joining = flexibility to move through birth canal o Frontal bone(not a paired bone in adulthood) in babies is 2 frontals separated by a metopic suture : will be gone by age 2  Tibia o Under the endochondral bone is the cancellous tissue with red bone marrow o Every growing long bone has a epiphysis(growing end) at the superior and inferior end :only grows here not at the shaft o Outside of bone tough connective tissue is periosteum o Under the periosteum is the compact tissue: cortal bone o Shaft of bone is diaphysis o Nutrient artery to feed the medullary canal with yellow bone marrow which goes through a hole in the diaphysis  Hole in the bone: foramen (functional hole)  Nutrient foramen  Proximal epiphysis always forms first fuses last o At 18 fuses o For couple years shaft of bone can get thicker get more mass o Initial bone is woven bone(baby bone) and then replaced by interstitial lamellae (layers,lamery bone) minerals held together by collagen o Then you get 2ndery osteon : which have blood vessel throught it o Use secondary bone to age bone 2 o When you are really old you are mostly 2ndery bone o Hole in the middle : Haversian canal o Under polarized light : cross feature = collagen+mineral Older bone: 2ndery osteons intruding on other 2ndery osteons  Younger bone: woven bone  Plexiform bone(non human):pig : layered  Dog bone: primary bone and 2ndery osteons in rows and squeared rather then human roundish  Hydroxapitte and collegen always the same but the structur
More Less

Related notes for ANT100Y1

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit