UNIT TWO TISSUES Flashcards
Epithelium tissue
- Laid on or covering
- Forms boundaries
- separates us from the outside world
- nearly all substances given off or received by the body must pass through this layer
4 types of tissue
Epithelium tissue - covering
connective- supporting
nervous- controlling
muscle- movement
functions of epithelium
protection
absorption
filtration
secretion
How is Tissue organized?
Into organs
Heart
Lungs
Kidneys
(first name) Simple epithelium vs Stratified
simple- one cell layer
stratified- more than one cell layer
squamous
flat
cuboidal
cube
columnar
columns
What are tissues?
A group of cells which are similar in structure and function
examples of epithelial cells
esophagus
mouth
outer portion of the skin
functions of connective tissue
- connects body parts
- found everywhere in the body
- most abundant and widely distributed of the tissue types
-protects supports and binds together other body tissues
-well vascularized
-subcutaneous tissue
-beneath the skin
what are bones?
osseous tissue
cavities in which bone cells sit in
what is cartilage?
less hard and more flexible than bone
found only in few places in the body
characteristics of dense connective tissue
- has collagen fibers as it’s main matrix element
-forms strong rope like structures - tendons
-attach skeletal muscle to bones - ligaments
- connect bone to bone at joints
- makes up the lower layers of the skin where it is arranged in sheets
loose connective tissue
adipose tissue
fat
forms subcutaneous tissue beneath the skin
insulates the body and protects it from extremes of both heat and cold
nervous tissue
- made up of cells called neurons
- neurons receive and conduct electrochemical impulses from one part of the body to another.
muscles tissue characteristics
contract or shorten to produce movement
muscle cells
muscle fibers because they are elongated to provide a long axis for contraction
smooth(visceral) muscle tissue
when it contracts the cavity of an organ alternately becomes smaller or enlarges so that substances are propelled through the organ along the pathway.
- contracts more slowly than the other two muscle types
where are epithelial cells found?
where filtration of exchange of substances by rapid diffusion occurs
tendons
skeletal muscle to bones
ligaments
bone to bone joint
loose connective tissue areolar
all body cells obtain their nutrients and release their wastes into this tissue fluid
edema
loose connective tissue vascular tissue
blood is a transport vehicle for the cardiovascular system carrying nutrients, wastes, respiratory gases
muscle tissue skeletal
attached to the skeleton of the body
can be voluntary controlled
forms the flesh of the body
when skeletal muscles contract they pull on bone or skin of the body and cause body movement or changes in facial expressions
muscle tissue cardiac
found only in heart
as it contracts the heart acts as a pump
cardiac muscle Is INVOLUNTARY control
we have no control over this
muscle tissue smooth visceral
found in the walls of hollow organs
stomach
bladder
uterus
blood vessels
