Animal Tissues Flashcards
Which junction help to stop substances from leaking across a tissue?
Tight Junctions
Which junction perform cementing to keep neighbouring cells together?
Adhering Junctions
Which junction facilitate the cell to communicate with each other ?
Gap junctions
1st phylum where tissues evolved ?
Coelenterata / Cnidaria
1st phylum where tissues evolved ?
Coelenterata / Cnidaria
Who coined the term ‘ Histology ‘ for study of tissues ?
Mayer
Who had given the term tissue in animals and plants ?
Animals - Bichat
Plants - N. Grew
Origin of all 4 tissues :
Epithelial - Ecto,Endo, Meso
Connective tissue - Mesodermal
Muscular - Mesodermal
Nervous - Ectodermal
Which is the most abundant tissues?
Connective - Areolar
What are the features of epithelial cells ?
- Cells are tightly packed with very less intracellular space
- Avascular ( get nutrients by diffusion)
- Nerve supply present
Where are squamous epithelium found and what are its function?
Found - Walls of blood vessels
- Air sacs of lungs
- Lining of bowman’s capsule
- Serosa layer
Function - diffusion
Features - flattened cells with irregular boundaries , also called pavement epithelium.
Where are cuboidal epithelium found and what it’s function?
Found - Ducts of glands
- Tubular parts of nephron
- Germinal epithelium
- follicles of thyroid gland
-epithelium of PCT (having microvilli)
Function - Secretion and absorption
Where are ciliated epithelium found?
Bronchioles (small has cuboidal & large has columnar) and fallopian tube (columnar)
Where are columnar epithelium found and what’s its function
Found - lining of stomach and intestine
- gall bladder and gastric & intestinal glands
Function - Secretion and absorption
Goblet cell is unicellular aur multicellular?
Unicellular
