Tissues Flashcards
What are tissues?
A group of similar cells that function together
What is the study of cells?
Histology
What does a pathologist do?
Examine tissue for damage and disease
Where are cell junctions located?
In most epithelial tissue and some muscle and nerve cells
What is the function of a tight junction?
Few cells together tightly to prevent substances passing between cells
What is the function of Adherens junctions?
Resist separation of cells when stretched
What is the function of desmosomes?
To prevent separation of cells under tension or contraction
What is the function of hemidesmosomes?
Attach cells to membranes and not to each other
What is the function of gap junctions?
Allows cells to communicate with one another
Where are tight junctions located?
Lining of stomach, intestines, and Bladdar
Where are Adherens junctions located?
Urinary bladder and uterus
Where are desmosomes located?
Epidermis and cardiac muscle cells
Where are Hemidesmosomes located?
Skin cells attached to basement membrane
Where are gap junctions located?
Nervous system, heart muscle, gastrointestinal tract
What do Exocrine glands do?
Secrete substances through tubes or ducts (sweat glands)
What do endocrine glands do?
Secrete into interstitial fluid and blood
Thyroid, pituitary gland
What are the three types of surfaces for epithelial tissue?
Ethical, lateral, basal
What are the three epithelial tissue functions?
Selective barriers- limit transfer of substances in and out of the body
Secretory services
Protective services
What does extracellular matrix consist of?
Ground substance, protein fibers
What is the function of extracellular matrix?
Provide strength to tissue to resist stretching and compressive forces
What do collagen fibers do?
Resist to tension and pressure
What do elastic fibers do?
Allow stretching without breaking
What do reticular fibers do?
Scaffold that support cells and ground substances
Name the four functions of connective tissue?
Connecting in binding, support, protection, transport
What do connective tissue’s connect and bind?
Anchor tissue layers in organs, link organs together
What do connective tissue’s support?
Bone cartilage and body weight
What do connective tissue’s protect?
Bone protects certain internal organs and cartilage and fat provide shock absorption
What do you connective tissue’s transport?
Blood
Name the types of connective tissue Proper cells?
Fibroblast, adipocytes, mast cells, Phaygosytes
Name the three specialized connective tissue’s?
Cartilage, bone tissue, blood
Is skeletal muscle tissue voluntary or involuntary?
Voluntary
Are cardiac muscle cells voluntary or involuntary
Involuntary
Are smooth muscle cells voluntary or involuntary?
Involuntary
What is the function of a membrane?
Anchor organs in place, surveyors barrier, function in immunity, and secrete various substances
What is the parietal layer is the Serous membrane?
Lines the body wall
What is the the visceral layer in the serous membrane
It covers the organ within the body cavity
What is the function of a serous membrane?
Reduce friction created one organs move it within respective membranes
What does a synovial membrane do?
Line cabbie surrounding freely movable joints like the knee or shoulder
What is the function of a mucous membrane?
Primarily protection
What is tissue repair?
The process of wound healing
Name three factors that affect tissue repair
Nutrition, blood circulation, age
