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during osteogenesis, this cell would appear first.


at what age do the bones of the sternum become completely ossified.


a deficiency of ____ hormone could result in reduced physical size as well as mental retardation.


the coronal suture separates the ____ from the parietal bones.

ethmoid, spenoid, frontal, maxillary

all these facial structures contain a sinus


the ____ suture separates the occipital from the parietal bones


the ___ allows a bone to increase its diameter during periods of growth


contains osteogenic cells that will deposit new bone


the articular ends of long bones are comprised of ____ tissue

haversian canal

the center of each osteon contains the _____.

volkmann's canal

osteons have a ____, which provides a means of communication between them.

epiphyseal disk

the ___ represents an area for growth in the length of a long bone

3rd month

when does ossification begin in a dev. fetus

4th month

by this age, most primary ossificaiton centers have appeared in the diaphyses of all bones

birth to 5 yrs

when do secondary ossification centers appear in the epiphysis


most cases of bone cancer probably involve an increase in the activity of the ____ cells.

Vit. D

the main factor which facilitates the movement of calcium through a cell membrane is ______.

Vit. D

is a coenzyme for the enzymes that transport Ca 2+ into or out of cells.

Vit D

the most important vitamin required for proper bone resorption and modeling

Vit. C

This vitamin is required to produce the organic matrix that allows bones to be pliable

Vit. C

vitamin that forms the C.T background for bones and teeth

pituitary Gh

an excess of this hormone will cause excess deposition in bones; the results of acromegaly are heavy, deformed bones

formation of a hematoma

which is the first to occur following a bone fracture. It releases blood into the area surrounding bone


the callus that forms around a bone fracture is comprised of ___ tissue.

yolk sac

the origin of blood cells is the ___

liver and spleen

where erythrocytes are produced in an embryo

bone marrow

where erythrocytes are produced in an adult


the color of the red bone marrow is mainly the result of ___


which type of bone is the primary source of red marrow in an adult


comprised of phosphate, carbonate, and OH ions. A salt in bone matrix

blood clotting, muscles, nerve tissue

3 functions that need calcium

bone matrix

the structure that requires calcium the LeASt to function


a reduction in bone mineral content is a char. of this disease


the sacrum is a part of this division of the skeleton


the largest foramen in the body. Large hole in the os coxa


the cheekbone is called the ___ primarily


the outer covering of each bone, made from fibrous CT, is called the _____.

spongy and red marrow

inside the epiphysis of each long bone, mostly ____ can be found

resting cells

which layers of cells in the epiphysis is responsible for anchoring the disk to bony epiphysis


the ____ suture joins the temporal and parietal bones of the skull


another name for the wrist bones are___


this bone would contain significant amounts of red marrow in an adult


a parietal bone can be classified as a _____ bone

yellow bone marrow

the medullary cavity in the diaphyisis of an adult bone would contain _____ . It is filled with adipose tissue


the part of the bone that the articular cartilage covers directly is the _______.

epiphyseal plate

the junction between the diaphysis and epiphysis in a growing bone is called the ____

bony callus

this is the last stage in the repair of a fracture


this bone contains the foramen magnum


a condition which causes bones to bend because of the lack of vitamin D and calcium in children.


True or False. Excess pituitary growth hormone will cause an 18 year old to become a giant.


this level of blood calcium could be the cause that increase the activity of the osteoclasts

cartilage and blood

bone is an organ that has many tissues in it including these two

circulatory and immunity

the skeletal system plays key roles in these two functions

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