Animal Tissues Flashcards
Tissues
- group of cells with similar form, performing the same function and are bound by an extracellular matrix
Tissue Level
- second platform of biological organization, above the cell and under the organ and organ systems
number of cell types in humans
210
Four Primary Animal Tissue
- Epithelial Tissue
- Connective Tissue
- Muscle Tissue
- Nervous Tissue
found covering the surfaces of an animal, or lining the surfaces of internal organs and cavities
Epithelium or Epithelial tissue
Functions of Epithelial Tissues
- Covering and Protection
- Absorption and Filtration
- Secretion
Types of Epithelial Tissue
- Simple Squamous
- Simple Cuboidal
- Simple Squamous in Tubular Arrangement
- Simple Cuboidal forming a small duct
- Simple Columnar
- Pseudostratified Columnar with Cilia
- Transitional
- Stratified Squamous (Moist Type)
Epithelial tissues may be classified into:
- shape
- layers
- special descriptions
3 classifications of epithelial tissue based on shape
- Squamous
- Cuboidal
- Columnar
cells are flat; nucleus are usually centrally located
Squamous
cells are cube-like; width and length almost similar
Cuboidal
cells are long, resembling columns
Columnar
2 classifications of Epithelial Tissue based on Layers
- Simple
- Stratified
one layer of epithelial cells
Simple
two or more layers of epithelial cells on top of one another
Stratified
Special descriptions of epithelial tissues include:
- Pseudo-stratified
- Transitional
resembling a stratified type, but are in truth simple;
the stratified appearance is brought by the irregular positioning of the nucleus and the unequal sizes of the cells
Pseudo-stratified
type of epithelial tissue that changes shape because of regular distension;
a characteristic of organs that are stretched often such as the urinary bladder
Transitional
supports function, connects tissues to another
Connective Tissue
Functions of Connective Tissue
- Transport of important compounds
- Binding and Support
- Storage
unlike the close arrangement of the epithelium, connective tissues are _____ and has lots of ______ between cells
spaced apart; intercellular tissues
Connective Tissues may be classified into:
- Connective Tissue Proper
- Special Connective Tissue
Examples of Connective Tissue Proper
loose or dense