Functions of Squamous cells
absorption and diffusion
Example of squamous cell
air sacs
Function of cuboidal and columnar cells
absorbs nutrients and produces secretion
Stratified
One layer of cells
Whats attached to the basement membrane
Basal laminar
Whats attaches to glands and contracts
Myoepithelial cells
Stomach lining mad up of
simple columnar cells
One layer with different shapes and sizes (looks multilayered)
pseudo-stratified
Mucus gland rich in
Proteoglycans
Proteoglycans absorb water and from
Mucus
Is epithelium vascular?
No is avascular (no blood supply)
Is muscle cells vasculated?
Yes
What do intercalated discs do in Cardiac muscle
pass electrical signal
Where is muscle tissue located
Skeletal, smooth, and cardiac
What is present in muscle fibres
Myosin and actin
What aids muscle tissue high demand
Swamped with mitochondria
Where is nervous tissue found
Grey matter in the CNS
What is cilla composed of (and arrangement)
tubulin (9 + 2 arrangment)
Example of what microvilli absorbs
Products of digestion
Example of role of cillia
Move fluid lining in the lung
Function of Glands
Secreting and absorbing epithelial cells
Multicellular gland
Liver
What does serous gland secrete (example)
watery secretion rich in propers e.g. digestive enzymes
Different epithelial cell arrangement called
transitional
pseudo-stratified columnar epithelium located
Trachea
Why are gap junctions important in the heart
allow cells to contract together
Functions of tight junctions
Seals intracellular spaces and waterproof
Whats allows adhering and maintain integrity of epithelia cells
Desmosomes Junctions
Whats stronger desmosome junctions or tight junctions
desmosomes
What does every cell make contact with
basal laminar
what do hemidesmosomes do
attach cell to ECM
Small bundled up gland closer to the surface
Acinar
Long gland further away from the surface
Tubular
Mucus gland more likely to be acinar or tubular
acinar
myoepithelial cells more likely to be found on cells secreting
mucus (thick secretions)
Whats stored in vesicles of endocrine glands
Proteins
Example of endocrine gland and its secretion
Pancreatic islets and insulin
Endocrines secrete into blood vessels by what process
exocytosis
Why are epithelia tissues arranged in rows between blood vessels in the Liver
Maximise blood flow
Epithelium line what is digestive system
Bial ducts and Blood vessels
Epithelium cells line what in Kidney
Blood vessels and renal pelvis
Under proliferation and over proliferation of pituitary gland cause what abnormal functions
dwarfism and gigantism
Over secretion of mucus gland in uterine tube can cause
in-fertilisation as eggs can’t move
What is connective tissue made up of (2 main components)
ECM and proteins
Examples of connective tissue
Blood, Bone, adipose, cartilage, proper
ECM composed of
Ground substance and fibre matrix
Connective tissue proper is either
loose or dense
Areolar connective tissue function
spongy layer holds intracelular fluid, and protection as where macrophages, mast cells and white blood cells
Loose connective tissue 3 types
Areolar, reticular and adipose
Function of adipose and example
required to protect your organs and help maintain your body temperature e.g. fat
Function of reticular and example
Forms the soft internal skeleton of something e.g. spleen and lymphoid organs
Where is areolar connective tissue widely disrupted
under epithelia of the body
Three Dense connective tissues
Regular, Irregular and elastic
Dense connective tissue has what more of what compared to loose, and connective tissue has more
collagen fibres, ground substance
Protein fibres of ECM
collagen, reticular and elastic
Difference between dense regular (e.g.) and irregular (e.g.)
Dense regular only pulls in one direction e.g. tendon where irregular allows movement in different directions e.g. shoulder
Dense Regular collagen fibres compared with Dense Irregular
Regular colagen fibres arranged parallel,
Where do cells in Connective tissue mostly secrete
Into ECM
Cells in connective tissue
Macrophages, WBC, fibroblasts, mast cells, adipose cells, osteoblasts,
Best example of loose connective tissue
blood
Loose compare to dense have
less fibres and more ground substance
All connective tissue develop from
Mesenchyme (undeveloped loose connective tissue)
