EAC Tissue Flashcards
what are the 4 types of tissue
Epithelial tissue or epithelium
Connective tissue
Muscle tissue
Nervous tissue
purpose of:
Epithelial tissue
provides coverings and lining membranes for surfaces inside and outside the body for:
Protection of underlying structures
Secretion
Absorption
purpose of:
Connective tissue
protect and support the body and its organs
provide bindings for the organs
Transport
Insulation
purpose of:
Muscle tissue
produce motion by contracting
purpose of:
Nervous tissue
to receive stimuli from both inside and outside the body and relay them to the brain, and to transmit impulses from the brain to other tissues of the body
example of:
Epithelial tissue
glandular epithelium
function of a gland
to secrete substances: hormones enzymes perspiration mucus
two types of glands
Endocrine (ductless): secretes into bloodstream
Exocrine (ducted): secretes via a duct or directly onto a free surface
examples of:
Connective tissue
Blood
Bone
Cartilage
Neuroglia
example of:
Nervous tissue
nerve cells are called neurons and are supported by Neuroglia
examples of:
Muscle tissue
Skeletal (voluntary) attached to the skeleton
Smooth (involuntary) found in digestive tract and blood vessels etc.
Cardiac (involuntary) found in the heart
Epithelial tissue may be:
Simple: a single layer of cells
Stratified: several layers of cells
examples of:
Simple Epithelium
Squamous (pavement) epithelium
Cuboidal epithelium
Columnar epithelium
define:
Squamous epithelium
flattened cells fitting closely together, laying on a basement membrane. forming a thin and very smooth membrane across which diffusion occurs.
define:
Cuboidal epithelium
cube shaped cells fitting closely together laying on a basement membrane. actively involved in secretion, absorption and/or excretion
define:
Columnar epithelium
rectangular in shape, on a basement membrane. it has adaptations that make it well suited to a specific function.
define:
Ciliated columnar epithelium
rectangular in shape, on a basement membrane. the epithelial cells have cilla on top
examples of:
Stratified Epithelium
Stratified squamous epithelium
Transitional epithelium
define:
Stratified squamous epithelium
composed of several layers of cells. the deepest layers are columnar and as the grow toward the surface the become flattened and are shed.
define:
Transitional epithelium
this is composed of several layers of pear shaped cells. It lines several parts of the urinary tract including the bladder and allows for stretching as the bladder fills.
Cells in connective tissue:
Fibroblasts Fat cells Macrophages Leukocytes Mast cells
Two types of nervous tissue
Excitable cells (neurones) initiate, receive, conduct and transmit information
Non-excitable cells (glial cells) support the neurones
muscle cells are:
specialised contractile cells
systems
integumentary muscular skeletal nervous endocrine lymphatic cardiovascular respiratory digestive urinary reproductive
