Ch.4 A&P

• Most composed of cells
• covers body surfaces
• nonvascular
• distinct cell surfaces
• cell and matrix connections

• protecting underlying structures
• acting as a barrier
• permitting the passage of substances
• secreting substances
• absorbing substances

• Simple epithelium(single layer)
• stratified epithelium(more than one layer)
• pseudo-stratified clumnar epithelium (appears to be more than one layer but is only 1)

flat or scalelike

cube-shape

cells are taller than wide

• Function; diffusion
• location: lining of things, heart

• function; active transport and facilitated diffusion
• location; kidney, glands and their ducts

• function; movement of particles, movement of things
• location: glands and some ducts, bronchioles of lungs

• function;protection agianse abrasion
• loaction: skin

• function; secretion, absorption, protection
• locations; sweat gland ducts, salivary gland ducts

• function; protection, secretion
• location; mamary glad ducts, larynx

• function;synthesize and secrete mucus
• location; lining of nasal cavity

• function;protects, accomodate
• locaiton; lining of the urinary bladder

disk shaped structures with especially adhesive glycoproteins that bind cells together

1/2 a desmosome attach epithelial cells to the basement membrane

hold cells together a form a permeability barrier

small contact region between cells containing protein channels that aid intercellular commmunication allowing ions and small molecules

glands with ducts

glands with no ducts

• enclosing and separating other tissues
• connecting tissues to another
• supporting and moving parts of the body
• storing compounds
• cushioning and insulating
• transporting
• protecting

maintain

create maxtrix

break down

fat cells, large amounts of lipds

lie beneath membranes, contain chemicals

cells containing enzymes

• 1.protein fibers
• 2.ground substance consisting of non fibrous protein
• 3.fluid

• structure; cells, fibroblasts, collagen fibers
• function; loose packing and support and nourishment for structures
• location;throughout the body

• function;packing material, thermal insulation, energy storage, and protection
• location; subcutaneous areas

• function; provides structure
• location; lymph nodes, spleen, bone marrow

• function; great tension
• location; tendons and ligaments

• function; stretch and recoil
• location;vocal folds

• functions;allows the growth of long bones
• location;long bones

• flexible and can hold pressure
• intervertebral disks

• provides rigidity with more flexibility
• ears

• provides strength
• interior of bones

• strength and support
• outer portions of bones

• long cylindrical cells
• moves body

• cylindrical cells that branch
• moves blood through blood vessels

• moves food through digestive tract,
• spindle shaped

• conducting cells of nervous tissue
• 1.cellbody; contains the nucleus and is the site of general cell functions
• 2. dendrites; usually receive action potentials
• 3. axon conducts action potentials away from cell body

consists of epithelial cells, their basement membrane, a thick layer of loose connective tissue

consists of three components a layer of mesothelium, basement membrane, and a delicate layer

• neurons transmit info
• brain

• conducts action potentials
• in ganglia