Flashcards in Module 4: Tissues Deck (49)
Loading flashcards...
1
4 classifications of tissues
Epithelial
Connective
Nervous
Muscle
2
Epithelial Tissue
AKA epithelium
Covers external surface of the body and lines internal cavities and forms glands
no nerve supply or blood supply
3
Tight junctions/Desmosomes
eip's fit snugly together
very small amount of extracellular material between the narrow spaces of epi's
4
Apical
Free or open surface of the epi
Most have microvilli on their surfaces (for better absorption or secretion)
5
Basal Lamina
non cellular, thin supporting sheet at the bottom of the epic
provides selective barrier
6
Shapes of Epi's
Squamous (thin, flat, nucleus shaped like disk)
Cuboidal (cube like, nucleus shaped like sphere)
Columnar (Tall and narrow, nucleus is long and narrow)
7
Layers of Eips
Simple (one layer)
Stratified (2 or more layers)
8
Simple squamous
lungs
for diffusion of oxygen and carbon dioxide
9
simple cuboidal
kidney tubules
for absorption and secretion
10
simple columnar
digestive tract
for absorption of nutrient and secretion of mucus
11
Pseudostratified Columnar
trachea
For secretion of mucus
12
Stratified squamous
epidermis of skin
for protection
13
Stratified cuboidal
swear and mammary glands
for protection
14
stratified columnar
pharynx and male urethra
protection and secretion
15
Transitional Epis
Lining of urinary bladder
stretches in response to tension when urine fills the bladder
16
Functions of Epithelial tissues
Protection
Sensory functions (receptors in epis in skin, nose, eyes, ears)
Secretion (glandular epis)
Absorption
Excretion (lining in kidneys filtrates urine)
17
Exocrine Glands
Secret substances onto free surface via ducts
substances include digestive enzymes, mucus, saliva, perspiration, breast milk
18
Endocrine Glands
Ductless, secret their substances directly onto surround tissues and blood
Substances include: hormones from pituitary, thyroid and adrenal glands
19
Connective tissue types (4)
cartilage, ligaments, tendons, bone, blood
has embryonic origin (mesenchyme)
has blood supply (vascular) except cartilage
Has an extracellular matrix
20
Parts of connective tissue
Specialized cells (fibroblast, macrophage, plasma, mast cells)
Extracellular protein fibres (collagen, elastic)
Ground substance (liquid, gel-like or solid form)
21
Collagen fibers
flexible and strong
found in bone and cartilage
22
Elastic fibers
Made from elastin
not as strong as collagen (but can return to original shape)
found in skin, walls of blood vessels, lung tissue
23
Reticular fibers
Made from collagen (but arranged differently)
thin but organized
found in soft organs such as glands and lymph nodes
24
Classification fo connective tissue (5)
loose connective, dense connective, cartilage, bone, blood
25
Loose connective tissue
loosely packed fibres
Subcategories: Areolar
Adipose
Reticular
26
Areolar
Binds organs together giving strength, elasticity and support
most dispersed, found underneath tips, in cavities, between muscles
27
Adipose
Provides protection, insulation, support and place to store energy
fat tissue found under the skin, around kidneys, within abdomen and kidneys
28
Reticular
Defends the body by filtering out microorganisms and other substances
Network of branching fibres found in spleen, lymph noes, bone marrow
29
Dense connective tissue
Densely packed fibers
Subcategories: dense regular
Dense irregular
elastic
30