Flashcards in Ch. 4 Histology Deck (38):
group of similar cells that perform a specific function.
4 types of tissues:
Epithelial,(covers) Connective(supports), Muscle(moves), Nervous(controls)
tightly packed cells that cover body surface and line organs. (2 subtypes: covering and lining & glandular) SECRETION / ABSORPTION. PROTECTS.
anchors epithelium to underlying tissue. (sticky polysaccharides)
3 surfaces of epithelial tissue:
basal, apical, lateral. (can undergo mitosis to replace themselves)
Epithelial tissue layers:
Simple, stratified, pseudostratified
single layer of cells. (absorption / secretion)
multiple layers (protection)
actually simple, appears stratified.
squamous, cuboidal, columnar, transitional. Keratinized, Ciliated, microvilli.
Endocrine and Exocrine glands.
ductless glands that produce hormones that get secreted.
secrete into skin or body cavities via ducts. Unicellular (Ductless). Multicellular (Ducts)
sparse population of cells scattered through extracellular fluid.
Main elements of connective:
ground substance, fibres, cells.
ground substance C:
material between cells. (interstitial fluid, cell adhesion proteins, proteoglycans)
3 fibres of connective:
collagen, elastin, reticular.
tough, strong, protein collagen.
stretch and recoil, protein elastin.
collagen fibres (more give). Support
connective tissue, cartilage, bone, blood.
fibroblasts, chondroblasts, osteoblasts, hematopoeitic stem cells.
4 major groups of connective tissue:
Connective tissue proper, cartilage, bone, vascualr connective tissue. (blood and lymph)
Loose connective (3):
Areolar, Adipose, Reticular.
Dense connective (3):
Elastic, Dense irregular, Dense regular.
(Hyaline, Elastic, Fibroelastic) Solid rubbery matrix containing collagen fibres.
Atypical. Support. (erythrocytes, leukocytes, blood plasma)
Muscle tissue (Skeletal):
Muscle fibres, myofilaments, Long & cylindrical. CONTROLS MOVEMENT. found in skeletal muscles that attach to bone or skin.
Muscle tissue (Cardiac):
Branching, intercalated discs. Found in walls of heart. Propels blood into circulation.
Muscle tissue (smooth):
central nuclei, propels substances along internal passageways (peristalsis). INVOLUNTARY MOVEMENT / MUSCLE. found in walls of hollow organs.
SUPPORT CELLS. transmit nerve impulses. Consists of dendrties and axons. (found in brain, spinal cord.)
Epithlium layer is where to Connective?
Epithelial layer bound to an underlying layer of connective tissue
skin. Keratinized stratified squamous. firmly attached to dermis .
line all body cavities open to the outside. (digestive, respiratory, urinary)
moist membranes lining ventral body cavities. Pleurae(covers lungs and thoracic walls), Pericardium(encloses the heart), Peritonium(abdomniopelvic viscera).