Tissue Flashcards
What is nervous tissue responsible for?
Internal communication and control
Hallmarks: irritable, conductive
Where is nervous tissue found?
Brain, spinal cord, and nerves
What is the primary function of muscle tissue?
Contracts to cause movement
Hallmarks: irritable, contractile
What are the types of muscle tissue?
Skeletal, cardiac, and smooth
What does epithelial tissue do?
Forms boundaries between different environments, protects, secretes, absorbs, filters
Hallmarks: one free (apical) surface, avascular
Where can epithelial tissue be found?
Lining of GI tract and other hollow organs, skin surface (epidermis)
What is the function of connective tissue?
Supports, protects, binds other tissues together
Hallmarks: extracellular matrix, varying vascularity
What are examples of connective tissue?
Cartilage, bones, tendons, fat and other soft padding tissue
What are the two major ways tissue repair occurs?
By regeneration and by fibrosis
What is regeneration in tissue repair?
Replacement of destroyed tissue by the same kind of cells
What is fibrosis in tissue repair?
Repair by dense (fibrous) connective tissue, forming scar tissue
What factors influence the type of tissue repair?
The type of tissue damaged and the severity of the injury
What is the body’s general response to tissue injury?
Inflammation, which attempts to prevent further injury
What is the immune response in tissue injury?
A specific response that mounts an attack against recognized invaders
How do cuts heal compared to ragged tears?
Cuts (incisions) heal much more successfully than ragged tears of the tissue.
What initiates the healing process after tissue injury?
Tissue injury sets off a series of events, starting with inflammation.
What role do inflammatory chemicals play in healing?
Inflammatory chemicals released by injured tissue cells make capillaries very permeable.
What happens to fluid during the healing process?
Fluid rich in clotting proteins seeps into the injured area from the bloodstream.