Body Tissues Flashcards
Tissues
groups of cells that are similar in structure and perform common function
FOUR Types Of Tissues
CONNECTIVE TISSUE
MUSCLE TISSUE
EPITHELIAL TISSUE
NERVOUS TISSUE
EPITHELIAL TISSUE
*epithelial tissue= glands*
associated with body covering (skin) and body lining (of bladder or stomach)
HISTOLOGY
the study of tissues
FUNCTION OF EPITHELIAL TISSUE
- protect
- absorbtion
- filtration
- secretion
CLASSIFICATION OF EPITHELIUM
number of layers and the shape of the cells
number of layers in the epithelium tissue
there are 2 layers.
1st layer= simple ; used for absorption, filtration and secretion
2nd layer= stratified ; used for protection
shape of epithelium tissue
squamous - flattened
cuboidal - cube shaped
columnar - column like
mucosae
lines all body cavities that open to body surface and they are often adapted for absorption or secretion.
* 1st layer epithelial tissue*
- respiratory (nose and trachea)
- digestive
- urogenital (genital and urinary opening)
gland
consists of cells that make and transport a particular product/secretion
TWO TYPES OF GLANDULAR EPITHELIA
- endocrine glands
- exocrine glands
endocrine gland
internal secreting
ductless
hormones
exocrine gland
external secreting and internal secreting
ducted
produce non-hormone products
(sweat, oil, milk)
there is unicellular glands and multicellular gland
unicellular exocrine glands
*globlet cells- make proteins*
located in the epithelial linings of intestinal and respiratory tract
produces and secretes mucin which forms mucus
multicellular cellular exocine glands
two parts which are the epithelium and secretory cell
- epithelium-
- derived duct - secretory cells
- makes enzymes for specific glands
- release exocrine glands by mitosis (holocrine products go with it)
- merocine
- apocrine