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Tissues
A group of cells that perform the same function
Tissues compose
organs
organs are typically made of ________ tissues
multiple
histology is
the study of tissues
Epithelial tissue functions
covering, lining, secreting
examples of epithelial tissue
outer layer of skin, intestines, respiratory tract
connective tissue function
binding and support
connective tissue example
adipose tissue, cartilage, bone, blood
functions for muscle tissue
functions for contraction for movement
example for muscle tissue
skeletal muscle
functions of the nervous tissue
transmit signals
example of nervous tissue
brain, spinal cord, nerves
what is this tissue?
Epithelial tissue
What is this tissue?
Muscle tissue
what is this tissue
connective tissue
What is this tissue?
Nervous Tissue
Ehlers-Danlos Syndrome is a
Mutation affecting the synthesis of connective tissue
Ehlers-Danlos Syndrome Symptoms
Hyper mobility, loose unstable joints that dislocate easily, extreme fatigue, skin that easily bruises, digestive problems
Epithelial tissues Greek roots meaning (EPi)(Thele)
Above, nipple
functions
to cover, line, and form secretions
skin,scalp,intestine epithelial cells are frequently replaced how often?
skin-30 days, scalp-3 days, intestines, 6 hours
do epithelial tissues have blood vessels? how do they acquire nutrients?
No blood vessels, rely on diffusion to acquire nutrients
Epithelial tissue layers
single layer
simple
multiple layers
stratified
appears stratified, but is 1 layer
pseudostratified
Flat, scale like
Squamous
What is this
Simple Squamous
what is this
stratified squamous
cuboidal
cube shaped
what is this
simple cuboidal
what is this
stratified cuboidal
columnar
rectangular
what is this
simple columnar
what is this
pseudostratified columnar
Squamous epithelial cells function
regulate the passage of substances into other tissues, can be a protective barrier against microorganisims
Location in Body
-blood vessels, vody cavities, outer layer of skin
Cuboidal Epithelial Cells Function
Aide in secretion, excretion, and absorption
Located in the collecting ducts of
Kidney,pancreas, salivary glands, sweat glands
Columnar epithelial cells function
secretion and absoprtion
Many have small hairlike projections called
cillia
Increase _______________ of organs
surface area
Location in the body
stomach, pharynx, respiratory tract
connective tissue
the main functions of connective tissues are to bind and support structures in the body
connective tissues are composed primarily of two types of fibers
Collagenous fibers, elastic fibers
Collagenous Fibers
Long thick fibers made of protein collagen (Very rigid and has high tensile strength)
Elastic Fibers
composed of protein elastic, very flexible, found in body where flexibility is required
what is this
collagen
what is this
elastin
both collagen and elastin are broken down by
sunlight (UV/X rays PNETRARATE skin) Nicotine (Tabacco smoke)
Why anti aging marketing is fake
Collagen is a protein, not lipid soluble, skin can’t absorb it through a cream. Or- a supplement, because your stomach acid would denature the proteins.
Loose vs Dense Connective tissue
Loose connective Tissue
Mixture of collagen and elastic fibers, tissue helps attach organ or tissue to another
examples of loose connective tissue
blood, adipose
What is this
Loose connective tissue
What is this
dense connective tissue
It is mostly__________________ fibers
collagenous
Connects_______ to ______ and is very strong
muscle, bone
examples
tendons, ligaments
WHat is this
Hyaline Cartilage
hyaline cartialage is the ________ common
most
it is composed of more______ than____, making it
collagen, elastin, flexible but firm
examples
nose, bone coverings
What is this
Elastic Cartilage
Contain primarily
elastin
Very
flexible
examples
ears, vocal cords
What is this
Fibrocartilage
It contains almost pure
collagen
It is very
tough
Used for _______ and __________ ___________________
padding, shock, absoprtion
examples
knees, vertebral discs\
what is this
adipose tissue- known asfat cells
it does what
store lipids in droplets that accumulate indefinitely
what is this
bone
Most______ connective tissue
rigid
Contains primarily collagenous fibers hardened by
minerals
what is this
blood
connective tissue that is not composed of
fibers
helps maintain _________ in the body
connections
what is this
hyaline cartilage
what is this
elastic cartilage
what is this
fibrocartilage
what is this
adipose
what is this
bone
what is this
blood
