Tissue Flashcards
It is a group of cells with similar structure and function plus extracellular substance (matrix)
Tissue
It is the study of tissues
Histology
Give the four primary types of Tissue
- Epithelium
- Connective Tissue
- Nervous Tissue
- Muscle
________ - line the outer surfaces of organs and blood vessels throughout the body, as well as the inner surfaces of cavities in many internal organs. An example is the epidermis, the outermost layer of the skin
Epithelial tissues
________ is found in between other tissues everywhere in the body, including the nervous system.
Connective tissue
________ - They support and protect the body. All of this tissue consists of three main components: fibers (elastic and collagenous fibers)
Connective tissue
Connective tissue have three main components, what are this three?
- Fibers
- Elastic
- collagenous fibers
_______ is a soft tissue that composes muscles in bodies, and gives rise to muscles’ ability to contract.
Muscle tissue
________ - is made up of different types of nerve cells, all of which have an axon, the long stem- like part of the cell that sends action potential signals to the next cell. Bundles of axons make up the nerves.
Nervous tissue
Functions of the __________ are sensory input, integration, control of muscles and glands, homeostasis, and mental activity.
Nervous system
Epithelium Characteristics are?
• Cells fit closely together
• Tissue layer always has one free surface
• The lower surface is bound by a basement membrane
• Avascular (have no blood supply)
• -Gets the nourishment from underlying connective tissues
• Regenerate easily if well nourished
Epithelial Tissues is Found in different areas, where are this?
• Body coverings
• Body linings
• Glandular tissue
Epithelium Function are?
- Protect:
Ex. Skin - Act as a barrier:
Ex. Skin keeps bacteria out - Diffusion and Filtration:
Ex. Lungs and kidneys - Secretion:
Ex. Sweat glands - Absorption:
Ex. Small intestine
Classified according to number of cell layers and cell shape
• Number of cell layers
_______ - one layer
_______ - one layer more than
- Simple
- Stratified
Classification of Epithelium,
Shape of cells
________ - flattened
________ - cube-shaped
________ - column-like
- Squamous
- Cuboidal
- Columnar
Give the answers of “Simple Squamous”
Structure: ?
Function: ?
Location: ?
- 1 layer of flat, tile-like cells
- diffusion and filtration
- blood vessels, lungs, heart, kidneys
Give the answers of Simple Cuboidal
Structure: ?
Function: ?
Location: ?
- 1 layer of square-shaped cells
- Secretion
- Glands, ovaries, kidneys
Give the answers of Simple Columnar
Structure: ?
Function: ?
Location: ?
- 1 layer of tall, narrow cells
- secrete mucus and absorption
- stomach, intestines, resp. tract
Pseudostratified Columnar
Structure: ?
Function: ?
Location: ?
- 1 layer of tall, narrow cells appears stratified but isn’t
- secrete mucus and propel debris out of resp. tract (cilia)
- nasal cavity and trachea
________?
• Single layer of flat cells
• Usually forms membranes
• Lines body cavities
• Lines lungs and capillaries
Simple squamous
________?
• Single layer of cube-like cells
• Common in glands and their ducts
• Forms walls of kidney tubules
• Covers the ovaries
Simple cuboidal
________?
• Single layer of tall cells
• Often includes goblet cells, which produce mucus
• Lines digestive tract
Simple columnar
________?
• Single layer, but some cells are shorter than others
• Often looks like a double cell layer
• Sometimes ciliated, such as in the respiratory tract
• May function in absorption or secretion
Pseudostratified
Stratified Squamous
Structure: ?
Function: ?
Location: ?
- many layers of flat, tile-like cells
- protect and acts as a barrier
- skin, mouth, throat, esophagus
• Transitional
Structure: ?
Function: ?
Location: ?
- special type of stratified epithelium changes shape (stretched squamous, not stretched cuboidal)
- hold fluids
- urinary bladder