histology Flashcards
straited, unbranched and multinucleated
skeletal muscle cells
where do peripheral nuclei appear on skeletal muscle
transverse section ed nuclei
what is epimysium
connectuve tissue that suurounds muscle
what is is perimysium
surrounds single fascicle
what is endomysium
connective tissue around single fibre
what does muscle contain
fasiciles, myofibril, sarcomeres
type 1 muscle
dark meat (duck)
type 2 muscle
white meat (chicken)
what is semi rigid and deformable, permeable, avascular and contains chondrocytes
cartilage
what is the most common type of cartilage
hyaline
where is hyaline cartilage found
at articular surfaces, tracheal rings, costal cartilage, growth plates and is a precursor in fetus to many bones
where do chondrocytes sit
in small spaces called lacuna
what is rigid, non permuable, and has cells that need to be nourished by blood vessels
bone
what are the roles of bone
provudes support, levers for movement, protection of internal organs, calcium store, haemopoesis,
what is haemopoesis
blood cell production within bone marrow
what is bone comprised of
bioapatite, collagen, water, non collagen proteins
what are margins of osteon
cement lines
what makes up the shaft of bone
outer shell of dense cortical bone
what occupies the end of bone
cancellous or trabecular bone
what is haversian canal
where osteoclasts drill into the bone with vessel growing in there
where are nuclei in skeletal muscle
at the periphery of the fibre just under the cell membrane
what is a bundle of muscle fibres called
fascicles
type 1 muscle fibres also called
red fibres
what type of muscle fibre is rare
type IIA
what is are type IIB muscle fibres also known as
white fibres
how are cartilage cells nourished
by diffusion through the extra cellular matrix
what do chondrocytes do
secrete and maintain the extracellular matrix around them
characteristic feature of hyaline cartilage
nests of chondrocytes
where is elastic cartilage found
external ear, corniculate cartilages, epiglottis and apices of the arytenoids
what mostly forms bone
bioapatite
what is cancellous
fine meshwork bone
what occupies the end of bones
cancellous or trabecular bone
where are osteoprogenitor cells located
located on bone surfaces
what are osteoblasts and where are they found
found on the surface of developing bone
what cells have plentiful RER and prominent mitochondria
osteoblasts
what are osteocytes
a bone cell draped within a matrix
what size are osteoclasts
large (40um)
where are osteoclasts found and what do they do
found on the surface of bone and are responsible for bon eresorption
