Lab identification terms Flashcards
plane
- imaginary flat surface
- using 3 points in space to show anatomical relationships btwn structures
median (mid sagittal) plane
- vertical
- passes through midline of body
- divides into left and right halves
frontal plane
- passes longitudinally from side to side
- divides anterior and posterior
transverse plane
- passes horizontally through body
- divides superior and inferior
directional terms
- anterior/posterior
- superior (upper)/ inferior (lower)
- proximal (near limb)/ distal
- medial (near midline)/ lateral
- superficial/deep
simple squamous epithelium
description
location
function
- description: single layer of flat cells with central nucleus
- location: inside blood vessels, heart, lines body cavities, alveoli
- function: diffusion, filtration, absorption, secretion
simple cuboidal epithelium
description
location
function
- description: single layer of cube shaped cells with central nucleus
- location: ovaries, testes, kidney tubules, ducts of glands
- function: secretion, absorption
stratified squamous keratinized epithelium
description
location
function
- description: multiple layers
- location: lining mouth, ass, vagina, esophagus
- function: protection from abrasion, repels water and bacteria
ciliated pseudo-stratified columnar epithelium
description
location
function
- description: cilia on top level, single layer, all cells sit on basement membrane
- location: nasal cavity, trachea, fallopian tubes
- function: moves particles or fluid along top surface of cells
transitional epithelium (stratified cuboidal)
- description: stratified, top layer cuboidal, when stretched becomes squamous, may have more than 1 nucleus
- location: urinary system
- function: permits expansion, protects from toxins
loose connective tissue
description
location
function
- description: made of 3 fibers (elastic, reticular collagen)
- cells are fibroblasts
- macrophage engulf bacteria
- contains mast cell which produces heprin & histamine
- disorganized
- location: dermis-subcutaneous
- function: surrounds/supports organs, glands, muscles & nerves
dense regular connective tissue
description
location
function
- description: parallel bundles of collagen fibers with fibroblasts in between
- connective tissues predominant cell
- location: tendons, ligaments
- function: elasticity (tensile strength) withstands great force
adipose tissue
description
location
function
- description: has large fat droplet
- cytoplasm and nucleus pushed to outside of cell
- has collagen and elastic fibers
- jelly ground substance
- location: bone marrow (yellow), padding around organs, deep layers of sin
- function: energy reserve, support, protection, stores fat
hyaline cartilage
description
location
function
- description:most abundant cartilage
- fine collagen fibers
- jelly ground substance
- chondrocyte in lacuna
- location: end of nose, fetal skeleton, surrounding joints, attach ribs to sternum
- function: fleiility, support, reinforcement, reduces friction
special connective tissue
description
location
function
- description: liquid matrix (plasma)
- red blood cells in matrix with no nucleus
- white blood cells have nuclei + granules
- platelets
- location: blood stream
- function: WBC: immune, RBC: transpo xygen and CO2, platelet: blood clotting
skeletal muscle
description
location
function
- description: long fibers
- striped (banded/striated)
- alternate dark and light stripes represent actin/myosin
- multiple nuclei
- voluntary
- location: muscles attached to skeleton
- function: posture, voluntary movements
cardiac muscle
description
location
function
- description: striated
- cardiocytes
- hghly branched
- single nuclei
- intercalcated discs represent gap junctions
- location: heart
- function: pump blood, involuntary
smooth (visceral) muscle
description
location
function
- description: non striated
- involuntary
- spindle shaped (fusiform)
- single nucleus
- location: walls of hollow organs
- function: propels substances along internal passage ways
nervous tissue
description
location
function
- description: neuron
- large cell body
- 2 or 3 nuclei
- many mitochondria
- dendrites: recieve nerve impulses and bring to cell body
- axon transpos impulses to neuron, muscle or gland
- location: nervous system
- function: recieve and conduct nerve impulses, neuroglia protects an supports neurons
sebaceous gland
produces sebum to keep hair water proof
arrector pili muscle
smooth muscles in dermis
- cause goosebumps when contracted
what kind of surface is the epidermis?
stratified keratinized squamous epithelium
dermis
connective tissue layer beneath the epidermis
- consists of loose CT, collagen fibers, reticular fibers
what layer does adipose tissue belong to?
deep beneath the skin (hypodermis)
- NOT skin
sudorifferous gland
produces sweat in dermis
- goes up through dermis in ducts and empties in sweat pores
lacunae
empty cavities
- osteocytes (mature bone) fills them
central canal
center of osteon
- contains blood vessels and nerves
osteocyte
mature bone site
- gets nutrients from central canal
osteon
functional unit of bone tissue
lamellae
rings of calcified matrix around central canal
canaliculi
small canal connecting osteocytes to each other and to central canal
perforating (volkman) canal
channel between neighboring osteons central canal
spongy bone
red and yellow bone marrow
compact bone
osteons
medullary cavity
found in shaft of bone
endosteum
lines the medullary cavity
epiphysis
end of extremity of the bone
diaphysis
shaft of the bone
periosteum
connective tissue covering the bone surface (external)
epiphyseal line
line by epiphysis
- represents bones growth center
fossa
bone depression
foramen
hole