Four Fundamental Types Of Tissues Flashcards
What are the four fundamental types of tissues
Epithelial
Connective
Muscular
Nervous
Epithelial tissue is composed of
Epithelial cells
Extra or intercellular substance
Consists of contiguous cells in opposition over a large portion of their surface
Cells are arranged in sheets or layers
Epithelial tissues
Epithelial tissues cells rest on a continuous extracellular layer called
Basal lamina
Epithelial tissues with absence of blood vessels among the cells is called
Avascularity
It forms a boundary layer that controls the movement of substances between the external and internal environment
Epithelial tissue
Maybe specialize for absorption and secretion and may bear motile cilia to move a film of fluid or mucus over its surface
Epithelial tissue
It is on the exterior of the body and resist abrasion and dehydration
Epithelial tissue
The three primary germ layers or origins of epithelium
Ectoderm mesoderm and endoderm
It is composed of the epidermis and glandular appendages of the skin
Ectoderm
This composed of the vascular endothelium kidneys and reproductive ducts
Mesoderm
Aries composed of the intestinal tract liver pancreas and lungs
Endoderm
Types of epithelial tissue
Membranous epithelium
Glandular epithelium
Epithelial cells covering services and lining cavities
Membranous epithelium
It describes the number of layers of cells
Subtypes of epithelial tissue
Four sub types of epithelial tissue
Simple epithelium
Stratified epithelium
Pseudo stratified epithelium
Transitional epithelium
1 layer of epithelial cell on a basement membrane or basal lamina
Simple epithelium
Describe two or more layers of epithelial cell on top of a basement membrane
Stratified epithelium
Describe one layer of epithelial cell on basement membrane but cells have different sizes nuclears are located in different areas inside the cell
Pseudostratified epithelium
The thickness of the layer of epithelial cells varies when the organ functions address the layer is thick where in functions it becomes thin
Transitional epithelium
It is according to the shape of the cell of the uppermost number of layers
Specific subtypes of membranous epithelium
Types of simple epithelium
Simple squamous epithelium
Simple cuboidal epithelium
Simple columnar nonciliated epithelium
Simple columnar ciliated epithelium
An example of this is endothelium mesothelium parietal layer of bowman’s capsule and pulmonary alveoli
Simple squamous epithelium
Sales lining the thyroid follicles germinal epithelium of ovary and ducts of many glands
Simple cuboidal epithelium
It is Lining the GIT and gallbladder
Simple columnar nonciliated epithelium
It lines the uterus and fallopian tubes
Simple columnar ciliated epithelium
Three types of stratified epithelium
Stratified squamous non keratinized epithelium
Stratified squamous keratinized epithelium
Stratified cuboidal epithelium
Stratified columnar epithelium
It lines the oral cavity esophagus and vagina
Stratified squamous non keratinized non-cornified epithelium
It is in the epidermis
Stratified squamous keratinized cornified epithelium
It lines the cells of the ducts of sweat and sebaceous glands
Stratified cuboidal epithelium
It lines the cells of the ducts of salivary and mammary glands
Stratified columnar epithelium
Two types of pseudo stratified columnar epithelium
Nonciliated and ciliated
It lines the docks of male reproductive and accessory male reproductive organs
Pseudo stratified columnar nonciliated epithelium
It lines the respiratory tract
Pseudo stratified columnar ciliated epithelium
Classification of glandular epithelium
Based on the presence or absence of ducts
Based on the number of cells
Based on the nature of secretions
Beast on the feet of secretory cells during active secretion
Two types of glandular epithelium based on number of cells
Unicellular gland and multicellular gland
Goblet cells
All other glands except goblet cells
Unicellular gland
Multicellular gland
Glands based on the nature of secretions
Mucous gland
Serous gland
Mucoserous gland
Cytogenic glands
Secrets a thick and viscid product, goblets
Mucous gland
Secretes a thin and watery product parotid gland
Serous gland
It is a mixed secretion can be found in the submandibular and sublingual gland
Mucoserous gland
Glands that produce cells such as testes and ovaries
Cytogenic glands
Glance based on the fate of secretory cells during active secretion
Merocrine gland
Apocrine gland
Holocrine gland
There is no destruction of the secretary cells, sweat glands
Merocrine gland
There is partial destruction of secretory cells such as mammary gland
Apocrine gland
There is total destruction of secretory cells such as sebaceous gland
Holocrine gland
Glands according to morphology
Tubulom
Alveolar
Tubuloalveolar
Is characterized by large amounts of extracellular materials that separate cells from one another
Connective tissue
It is the components of extracellular material or matrix under connective tissue
Protein fiber
- collagen
- reticular
- elastic
Ground substance
Fluid
Is the shapeless background against which cells and collagen fibers are seen in the light microscope and it is an important component in proteoglycans made up of protein and polysaccharide
Ground substance
Functions of the connective tissue
Enclosing and separating tissues
Connecting tissues to one another
Supporting and moving
Storing energy
Cushioning and insulating
Transporting
Protecting
Classification of connective tissue
Loose or areolar
Adipose
Dense connective tissue
Consist of collagen and elastic fiber where fibroblast are commonly found
Loose or areolar
Responsible for the production of the fibers of the matrix
Fibroblast
Consist of collagen and elastic tissue but is not a typical connective tissue it also acts as a pad and thermal insulator
Adipose
These are filled with lipids and function to store energy
Adipose cells
Consist of densely packed fibers
Dense connective tissue
Two types of dense connective tissue
Dense collagenous and dense elastic
Has extracellular matrix consisting mostly of collagen fibers
Dense collagenous
Examples of dense collagenous connective tissue
Tendons
Ligament
Dermis
Capsule
Has abundant elastic fibers among collagen fibers
Dense elastic
Example of dense elastic connective tissue
Vocal chords
Walls of large arteries
Elastic ligaments
Is composed of cartilage cells or chondrocytes
Cartilage
Cartilage is composed of cartilage cells are also called as
Chondrocytes
Types of cartilage
Hyaline
Fibro cartilage
Elastic
Most abundant of the cartilages and it covers bones forms joints coastal cartilage that attach ribs to sternum
Hyaline
Has more collagen than does hyalin cartilage it is found in the discs between vertebrae and some joints
Fibro cartilage
Contains elastic fibers that appears as coiled fibers among bundles of collagen fibers
Elastic
It’s a hard connective tissue that consists of living cells and a mineralized matrix
Bone
Bone cells is also called as
Osteocytes
Bone cells or osteocytes are located within the spaces in the matrix called
Lacunae
Two types of bone
Compact
Cancellous
Is unique because the matrix is liquid enabling blood muscles to move through blood vessels
Blood
Main characteristic is its ability to contract or shorten
Muscle tissue
It is a result of contractile proteins located within the muscle cells
Muscle contraction
Types of muscle tissue
Skeletal
Cardiac
Smooth
40% of the person’s body weight and it is attached to the skeletal system that enables a person to move voluntarily
Skeletal muscle tissue
Muscle of the heart and is responsible for pumping blood it is involuntary and they have a characteristic feature which is the presence of intercalated disks
Cardia c muscle tissue
Forms the walls of the hollows organs and also is found in the skin and the eyes
Smooth muscle tissue
It is responsible for movement of food through digestive system and empathying of the urinary system
Smooth muscle tissue
It forms the brain spinal cord and nerves which is responsible for coordinating and controlling many bodily activities that is dependent on the ability of the cell to communicate to one another by electrical signals called action potential
Nervous tissue
Ability of the cell to communicate to one another by electrical signals
Action potential
Nervous tissue contains very important cells which are
Neurons and neuroglia