Tissues of the Body Flashcards
Epithelial Tissue function
Protects, limits diffusion, lines inside hollow organs
Tight junction
Electric ion bonds preventing substances passing through adjacent cell walls
Adherins junction
Plaque with Cadherin spanning across adjacent cell walls to link to its microfilaments via catenin - Prevent seperation during contractions
Gap Junction
6 protiens called connexons join to form tunnels called connexins for trasnfer of information between cell walls
desmosome
cadherin spans between cell walls and binds to intermediate filaments of other cell via desmoplankin - Prevent tearing forces
Hemidesmosome
Cadherin spans between basement membrane and cell for integrin to promote bonding between intermediate filaments and laminin
basement membrane components
basal laminina and reticular lamina
basal lamina function and components
supports epithelium and provide surface for cell movement - collagen and laminin
reticular lamina components
collagen and fibronectin
cytoskeleton function and components
provide structue - microfilaments (actin), Intermediate filaments (Keratin), microtubules (Tubelin)
Simple squamous epithelia
Thin for filtration - Kidneys
Diffusion - Lungs
Secretion - Serous membrane
Simple cuboidal epithelia
Secretion and absorption - Kindeys, pancreas, ducts and glands
Simple non ciliated columnar epithelia
Increase surface for absorption via microvili
Simple ciliated columnar epithelia
Assists movement of substances - Uterus and lungs
Goblet cells
Mucous filled singular ducts for lubrication
Stratified non keratinised squamous epithelia
protection against microbes - Mouth, throat, anus
Stratified keratinised squamous epithelia
Skin cells - Dead cells are the keratin that rise to the surface
Stratified cuboidal epithellia location
Found in adult sweat ducts and urethra
Stratified columnar epithelia location
Ducts, glands, urethra
Stratified transitional epithelia
Bladder
Pseudostratified ciliated columnar
Goblet cells for lubrication and cilia for movement - Upper airways
Pseudostratified non cilliated columnar epithelia
No goblet cells or cilia
Absorption and protection - Glands, epidydimus
Microvilli
Short rough brush boarders increase surface area for absorption
Cilia
Long brush boarders assist movement of substances
Endocrine Glands
Secretion directly into blood for distant but strong effects - Pituatry, Pineal, Thyroidq
Exocrine Glands
Secretion via ducts onto surfaces for local effects - Pancreas
Single cell gland
Goblet cells
Multicellular simple gland
single duct with no divides
Branched multicellular gland
Multiple secreoty areas sharing one duct
Compound multicellular gland
Duct divides multiple times towards secretory cells
Simple tubular location
Intestinal glands
Simple coiled tubular location
Sweat glands
Simple branched tubular location
Mucous glands of oespohagus , tongue
Simple aveolar acinar function
Stage in embryonic development
Aveolar glands
Glandular cells forming sacs
Simple branched aveolar location
Thyroid cells and sebaceous glands
Compound tubular location
Mucous glands in mouth
Compound aveolar acinar location
mammary glands
compound tubuaveolar location
salivary glands, pancreas
