Ch. 3 Types Of Tissues Flashcards
(17 cards)
What is the function of epithelial tissue?
Control of permeability
Absorption
Production of specialized secretions
— glands start out as epithelial tissue
What is the function of mucous membranes and what does it consist of?
Function: line openings of the body,
Consists of: stratified squamous epithelial (non- keratinized) I.e. wet.
What is the role of serous membranes and what does it consists of?
Function: line organs and body cavities
Consists of: simple squamous epithelial and lose areolar connective tissue
—– makes serous fluid
What is the role of cutaneous membranes and what does it consist of?
Function: skin
Consist of: stratified squamous epithelial (keratinized) and dense irregular connective tissue
What is the role of synovial membranes and what does it consist of?
Function: line joint capsule
Consist of: simple squamous epithelial and lose areolar connective tissue
What is the function of glands?
Specialized epithelial cells that secrete products into extracellular spaces or produce hormones
Why are membranous epithelial tissues important?
- Forms a cohesive blanket on a surface
- Cells are tightly bound allowing communication and passing nutrients
- Cells constantly being replaced via mitosis
- Avascular: no vessels within the cell layers
What is the function of cilia?
Non membrane bound and they move things from middle to outer opening.
What is the function of micovilli?
Membrane bound and they enhance absorption
Where are simple squamous epithelium found and what is its functions
Line body cavities, blood vessels, tubules.
Reduce friction, controls vessels permeability and they absorb and secrete.
Where are simple cuboidal epithelium found and its function?
Glands and ducts
Limited protection along with secretion and absorption
How are glandular epithelia distinguish?
Structure of gland
- — multicellular glands: pancreas
- — unicellular glands: goblet cells
Type of secretion produced
Mode of secretion
How do endocrine glands function?
Products are made in glands and delivered through the bloodstream to target cells.
– are not part of the membrane
How do exocrine glands function?
Products are secreted into neighboring area or delivered through ducts.
What are the modes of glandular secretion?
- Merocrine: exocytosis, just the product is released.
- Apocrine: product and cytoplasm are released; part of the cell leaves with the secretion
- Holocrine: destroys the cell; entire cell is secreted
What is connective tissue?
Cells that make a matrix which is the extracellular fibers that the cells live in.
Cells don’t touch each other, separated by the matrix they are producing
What are the function of connective tissues?
Supportive structural framework
Transportation of fluids
Protecting, insulating organs
Surround and connect other tissues
Storing energy reserves
