Shared Flashcard Set

Details

last practical
anatomy practical
32
Anatomy
Undergraduate 1
12/09/2011

Additional Anatomy Flashcards

 


 

Cards

Term
myofilament
Definition
smallest of the muscle bundle
Term
myofibril
Definition
bundle of myofilaments
Term
muscle fiber
Definition
bundle of myofibrils
Term
fascicle
Definition
bundle of muscle fibers
Term
osteons
Definition
compact bone tissue is composed of repeating structural units called
Term
concentric lamellae.
Definition
series of rings of matrix material of increasing size
Term
lacunae
Definition
concentric rings of matrix within small open spaces called
Term
canaliculi
Definition
tiny canal-like openings called
Term
intramembranous ossification
Definition
bone growth within loose, fibrous connective tissues)
Term
endochondral ossification
Definition
bone growth at the epiphyseal plate is essentially just a continuation of the process of endochondral ossification
Term
proliferation zone
Definition
cartilage cells undergo mitosis
Term
hypertrophic zone
Definition
older cartilage cells enlarge
Term
calcification zone
Definition
matrix become calcified; cartlage cells die; matrix begins deteriorating
Term
ossification zone
Definition
new bone formation is occuring
Term
osteoclasts
Definition
Osteoclasts are involved in the process of bone resorption. During this process, these multinucleated cells release both acids and enzymes which breakdown the organic and inorganic components of bone matrix.
Term
Langerhans’ cells
Definition
immune cells which help to protect the body from substances that are able to penetrate into the epidermis
Term
Merkel cells.
Definition
Merkel cells are associated with sensory nerve endings. Together with these nerve endings, Merkel cells form sensitive touch receptors called Merkel disks
Term
epidermis
Definition
From deep to superficial, the strata of the epidermis are the stratum basale, the stratum spinosum, the stratum granulosum, the stratum lucidum (which is only found in thick skin) and the stratum corneum
Term
Stratum basale:
Definition
A single row of cells directly adjacent to the dermis which are constantly undergoing mitotic division. These mitotic cells produce millions of new cells daily, and as new cells are produced, older cells are pushed towards the skin’s surface. Additionally, melanocytes within this layer produce melanin which is then delivered to more superficial cell layers
Term
Stratum spinosum
Definition
Several cell layers immediately superficial to the basal layer. These cells continue to divide, but more slowly than cells within the stratum basale.
Term
Stratum granulosum
Definition
A thin layer of cells which contain large amounts of the protein keratin. As cells progress towards the superficial side of the stratum granulosum, they begin to die as they become too far from their nutritional source located within the dermis below.
Term
Stratum lucidum
Definition
A very thin layer of dead keratinocytes present only in thick skin
Term
Stratum corneum
Definition
The most superficial layer of the epidermis which consists of twenty to thirty layers of flattened, dead keratinocytes
Term
papillary layer
Definition
superficial layer of the dermis and consists of areolar connective tissue
Term
reticular layer.
Definition
contains an extensive network of tiny blood vessels which supply the avascular epithelial tissues of the epidermis with nutrition
Term
Meissner’s corpuscles
Definition
pain and touch receptors
Term
Ruffini’s corpuscles.
Definition
stretch-sensing receptors
Term
Pacinian corpuscles
Definition
pressure receptors
Term
tonicity
Definition
comparison of the concentration of dissolved material in a solution, relative to the concentration of dissolved material within the cells in that same solution
Term
isotonic
Definition
If the liquid portion of a solution contains the same amount of dissolved material as do the cells within that solution
Term
hypertonic
Definition
When the liquid portion of a solution contains a greater amount of dissolved material than do the cells within that solution
Term
hypotonic
Definition
if the liquid portion of a solution contains less dissolved material than do the cells within that solution
Supporting users have an ad free experience!