Exercise 4: Tissues (Lab) Flashcards
Exhibit cellularity and perform protection, absorption, filtration and secretion functions
Epithelial Tissue
Fit closely together to form compact cells arranged in continuos sheets
Epithelial cells
Avascular and are nourished by diffusion from the capillaries of underlying connective tissues
Epithelial tissue
Epithelial tissues classification ( type of cells present)
Squamous
Cuboidal
Columnar
Transitional
Epithelial tissues - the number of cell layers
Simple
Stratified
Simple epithelial tissue
Simple squamous epithelium
Simple cuboidal epithelium
Simple columnar epithelium
Pseudostratified ciliated columnar epithelium
Consists of only one layer of squamous cells
Simple squamous epithelium
Simple squamous epithelium can be found in
Air sacs of the lungs
Walls of capillaries ( endothelium)
Serous membrane or serosae
Composed of one layer of cuboidal resting on a basement membrane
Simple cuboidal epithelium
Simple cuboidal epithelium can be found in
Walls of kidney tubules
Glands and their ducts
Surface of ovaries
Made up of one layer of cells that are taller than they are wide
Simple columnar epithelium
Lines the entire length of digestive tract from the stomach to the anus
Simple columnar epithelium
Secrete mucus for lubrication
Goblet cells
Appears to be stratified but is actually a single layer of cells, all of which touch the basement membrane although not all reach the apex
Pseudostratified ciliated columnar epithelium
Give the false impression of bing stratified
Pseudostratified ciliated columnar epithelium
Found in the respiratory tract
Pseudostratified ciliated columnar epithelium
Most common of the stratified epithelia and consists of several layers
Stratified squamous epithelium
Found in areas that are often subjected to friction or abuse
Stratified epithelium
Lines mouth, esophagus, and vagina
Non- keratinized stratified squamous epithelium
Found in the epidermis of the skin
Keratinized stratified squamous epithelium
Rare types of epithelia and are only found in the ducts of large glands
Stratified cuboidal and stratified columnar
Two cell layers and the apical layer of cells are cuboidal in shape
Stratified cuboidal tissue
Consist of basal cells that vary in size and shape and apical cells that are columnar
Stratified columnar epithelial tissue
Highly modified, stratified type of epithelium where cells change in shape depending on whether the organ is distended or contracted
Transitional epithelium
Forms lining or the urinary bladder, ureters,, and part o the urethra
Transitional epithelium
Most abundant primary tissue in the body
Connective tissue
Functions of connective tissue
Connecting and binding body parts together
Protecting the organs
Provide framework for movement of muscles
Loose and dense connective tissue, cartilage, bone and blood
Mature connective tissues
From the extracellular matrix of loose connective tissues
Fibroblasts
Formed by the chrondroblasts and maintained by chrondrocytes
Extracellular matrix
Enables connective tissues to form packaging materials around organs, bear weight, withstand abrasion and other abuses, and absorb large amounts of water to serve as reservoir in the body
Extracellular matrix
Loose connective tissue
Areolar connective tissue
Reticular
Adipose
Universal packing material that binds together and keeps them in their proper position
Areolar connective tissue
Most abundant type of connective tissue
Areolar connective tissue
Predominantly composed of reticular fibers which are synthesized by reticular cells
Reticular connective tissue
Fibroblasts that synthesize more reticular fibers than collage out fibers
Reticular cells
Forms the stroma in lymphoid organs like the spleen and Lymph nodes
Reticular connective tissue
Forms the hypodermics or subcutaneous tissue beneath the skin where it serves as an insulator, protecting the body from extreme heat and cold
Adipose connective tissue
Contains Fibroblasts, ground substance and adipose cells
Adipose connective tissue
Dense connective tissue
Dense regular connective tissue
Dense irregular
Made up of extracellular matrix that is packed with collagenous fibers that are compactly arranged in an orderly manner with fibroblasts cells squeezed in between the collagenous bundles
Dense regular connective tissue
Attach muscles to bones
Tendons
Connect one bone to another
Ligaments
Consists of densely packed collagenous fibers that are arranged in a disorderly or irregular manner
Dense irregular connective tissue
Dense irregular connective tissue found in
Dermis of the skin
Perichondrium of cartilage
Periosteum of bones
Dense, firm but liable, Avascular type of connective tissue with an extracellular matrix consisting of collagenous and elastic fibers
Cartilage
Responsible for its tensile strength and gelatinous ground substance provides for its resiliency
Collagenous fibers
Nourished through diffusion from underlying vascular tissues
Chondrocytes
Predominant cartilage in the body and precursor of most bones
Hyaline cartilage
Glassy and homogenous appearance
Hyaline cartilage
Surrounded by a perichondrium and is the weakest of the three types of cartilage
Hyaline cartilage
Thread like network of elastic fibers embedded within the matrix
Elastic cartilage
Provides strength and elasticity and maintains the shape of structures such as external ear
Elastic cartilage
Only cartilage without perichondrium
Fibrocartilage
Collagenous bundles are densely packed and arranged in a herringbone pattern
Fibrocartilage
Few spans smaller chrondrocytes that are seen scattered along the collagenous bundles
Fibrocartilage
Provides strength and rigidity and is the strongest type of cartilage
Fibrocartilage
Hardest of the connective tissue, composed of bone cells
Bone or Ossetia tissue
Two types of bone tissue
Compact bone
Spongy bone
Unit structure of bone tissue
Haversisn system or osteon
Present in compact bone but absent in spongy bone
Osteons
Considered a connective tissue because it consists blood cells, fibers and matrix
Blood
Contains hemoglobin which combines with oxygen to form oxyhemoglobin
Red blood cells
White blood cells consist of
Agranulocytes
Granulocytes
Agranulocytes
Lymphocytes
Monocytes
Granulocytes
Neutrophils
Eosinophils
Basophils
Liquid matrix that bathes the cells
Plasma
Specialized for contraction
Muscular tissue
Highly vascularized and innervated
Muscular tissue
Units of histological organization are cells that have become elongated
Fibers
Ability to contract or shorten producing movement
Muscle fibers
Three types of muscle tissue
Skeletal
Cardiac
Smooth muscle tissues
Striated and voluntary
Skeletal muscle tissues
Form long cylindrical units with s multi uncleared appearance
Skeletal muscle tissues
Nuclei found along periphery of long cylindrical units
Skeletal muscle tissues
Striated and involuntary
Cardiac muscle tissues
Composed of smaller branching cells and may be mononucleated or binucleated
Cardiac muscle tissues
Characterized by the presence of intercalated disks which are dark bands where cardiac muscle cells connect end to end
Cardiac muscle tissues
Made up of spindle or fusiform shaped cells with a centrally located nucleus
Smooth muscle tissues
Smooth muscle tissues found in?
Blood vessels
Airways to lungs
Visceral organs
Contracts much more slowly than other muscle types
Smooth muscle tissues
Nervous tissues
Brain
Spinal cord
Nerves
Two principal cell types of nervous tissue
Neurons
Neuroglia
Ability to react to various stimuli
Nerve cells or neurons
Receive and send information may have one or more nerve processes that receive and send information as nerve impulses
Neurons
U branched nerve process that transmits impulses away from the nerve cell body
Axon
Branched process that transmits impulses toward the cell body
Dendrite
Do not conduct impulse but serve as supporting tissues
Neuroglia
Non striated and involuntary
Smooth muscle tissues
Characteristics of epithelial tissue
- Cells are compactly arranged
- Cells are arranged in one or more layers
- Basement membrane may not be present
- Avascular
No blood supply
Avascular
Examples of simple squamous
Scraping from inner cheek
Lining of alveoli
Bowman’s capsule
Examples of simple cuboidal
Cross section of kidney tubules
Ex of simple columnar
X section of the small intestine
Cells that make up pseudo stratified ciliated columnar epithelial tissue
Columnar cell w/ forked ends
Spindle shaped cells
Spheroidal cells
Ex of pseudo stratified ciliated columnar epithelial tissue
X sec of trachea
Ex of stratified cuboidal
Submaxillary gland
Large sweat glands
Characteristics of connective tissues
A. Originate from the mesenchyme
B. Cells, fibers and matrix
C. Matrix of connective tissue varies in consistency
D. All of c.t. Are vascular except cartilage
E. Fewer cells
Compact, dense, uniform
Collagenous
Envelopes a cartilage
Perichondrium
Very young but fibers are not obvious
Mucous c.t.
When stained with silver - brown ( argyrophilic)
Reticular c.t.
Bone forming cells
Osteoblast
For bone resorption
Osteoclast
Mature bone cells
Osteocyte
Spongy bone sandwiched bet. 2 compact bones
Dipole
Liquid portion of the unclotted blood
Plasma
Liquid portion of the clotted blood
Serum
Natural occurring anticoagulant
Heparin
Pink granules in the cytoplasm
Neutrophil
Rarest, bluish granules
Basophil
Fragments of giant cells called megakarocytes
Platelets
Respond to stimulus
Irritability
Transmit stimulus
Conductivity
Functions of nerve processor
- Sensory / afferent
- Association neuron
- Motor/ efferent
3 meninges
-dura mater
Arachnoid mater
Pia mater
Maintain chemical environment necessary for the transmission action potential
Astrocyte
Myelin sheath production in the CNS
Oligondrocyte
Produce csf
Ependymal ccn
Produce myelin sheath in the CNS
Schwann cell
Supporting cells
Satellite cells
Protect nervous system from foreign toxic substances
Microfilm
Lining , covering, and glandular tissues of the body
Epithelial Tissue