“whoso neglects learning in his youth, loses the past and is dead for the future” -euripides,...
TRANSCRIPT
“Whoso neglects learning in his youth, loses the past and is dead for the future”
-Euripides, Greek playwright
4 types of human tissue
ep ith e lia l t is su e con n ec tive t is su e n ervou s t is su e m u sc le t is su e
fou r typ es o f t is su e
I. EPITHELIAL TISSUE Function-cover or lining of organs A. Stratified squamous epithelium
1. Function- protect from injurya. cells on the bottom are round-they become flat near the top
2. Location- skin
B. Simple columnar epithelium 1. Shape- long rectangles,
packed close together 2. Location- lining of digestive
tract (stomach, intestines) 3. Function- to secrete
chemicals and absorb nutrients
C. Ciliated Epithelium A. Similar to columnar epithelium, but
with CILIA B. Location: trachea, oviducts (uterine
tubes) C. Function: movement of mucus or egg
by ciliary action FYI: There are other kinds of epithelium:
simple squamous, cuboidal, transitional, etc.
Loose connective (areolar) A.Matrix- collagen and
elastin (proteins), tissue fluid (water)
B.Location: dermis of skin, subcutaneous layer, around nerves and blood vessels
B. Dense (Fibrous)Connective Tissue 1. Matrix- parallel
collagen fibers (strength) 2. Location- ligaments
and tendons
C. Blood 1. Living cells- red blood
cells, white blood cells, platelets
2. Nonliving MATRIX- plasma (mostly water)
E. Cartilage 1. 3 types of cartilage
a. hyaline cartilage- connects ribs to sternum, covers ends of bones
b. elastic cartilage- shape of outer ear, vocal cords
c. fibrocartilage- between vertebrae
F. Adipose A. large cells found throughout
the body B. Structure- vacuole with fat
droplet C. Function - stored energy,
food, padding , insulation
III. NERVOUS TISSUE A. Made of neurons
(nerve cells) B. Function- send and
receive messages, communicate
C. Location- brain, spinal cord, nerves
IV. MUSCLE TISSUE A. Function: contract B. 3 types- smooth, cardiac and
skeletal muscle (voluntary)
1. Skeletal muscles- striated (striped), multiple nucleia. Location- in muscles that attach
to bones
V. TISSUE REPAIR A. Regeneration- new cells are
same type and normal function is restored
B. Fibrosis- Replacement tissue develops (scar tissue)- some loss of function
C. The type of repair depends upon: 1. How severe the injury is 2. What kind of tissue