Bones, Developmental Genetics, and Hox Genes Flashcards
trabecular
spongy and porus material at proximal and distal ends of long bones
cortical
hard solid osseous tissue in cortex of bone
periosteum
layer of connective tissue, filtered by blood vessels and nutrient arteries
sharpey’s fibers
connect periosteum tissue to penerate bones all around
endosteum
inner surface of bony wall between bone and bone marrow
nutrient artery and foreman
artery enters through foreman to connect/provide nutrient for bone
osteon
cylindrical vascular tunnels that make up cortical bone
haversian canal
blood vessels and nerve fibers that for a narrow series of tubes
Volkman’s canals
transmit blood vessels from periosterum into bone to communicate with haversian canals
sonic hedgehog
produces SHH protein which aids in instructing morphology
zone of polarizing activity (ZPA)
where sonic hedgehog is produced
rhombomeres
compartments in hine of brain that express different patterns of HOX genes
lacunae
small spindle spaces that contain ostecyte left behind by osteoblasts in process of remodeling
physis
principle of growth and change in nature
homeosis
transformation of one structure of the body into the homologous structure of another body segment