tissues
TRANSCRIPT
TissuesTissues
• Tissue is a group of cells that perform a common or related function
• They are similar in structure
• Tissue is a group of cells that perform a common or related function
• They are similar in structure
Epithelia Tissue Connective Tissue Muscle Tissue Nervous Tissue
Epithelial TissueEpithelial Tissue
• Epithelia tissue is a sheet of cells that cover a body surface or cavity
• Epithelia tissue is a sheet of cells that cover a body surface or cavity
Tissues Simple Epithelia Stratified Epithelia
Simple EpitheliaSimple Epithelia
• Composed of only a single cell.
• Function in absorbtion and filtration
• Composed of only a single cell.
• Function in absorbtion and filtration
Epithelia Simple Squamous Simple Cuboidal Simple Columnar
Simple SquamousSimple Squamous
• Flat cells with sparse cytoplasm
• Found where rapid filtration is needed
• Two types-Mesothelia and Endothelia
• Flat cells with sparse cytoplasm
• Found where rapid filtration is needed
• Two types-Mesothelia and Endothelia
Simple Epithelia Simple Cuboidal Simple Columnar
Simple CuboidalSimple Cuboidal
• Simple Cuboidal cells are formed of a single layer of cells
• Form the walls of the glands and the kidney tubules
• Simple Cuboidal cells are formed of a single layer of cells
• Form the walls of the glands and the kidney tubules
Simple Epithelia Simple Squamous Simple Columnar
Simple ColumnarSimple Columnar
• Mostly associated with absorbtion and secretion
• Line the digestive tract
• Contain microvilli and goblet cells, furthering the it’s purpose
• Mostly associated with absorbtion and secretion
• Line the digestive tract
• Contain microvilli and goblet cells, furthering the it’s purposeSimple Epithelia Simple Squamous Simple Cuboidal
Pseudostratified ColumnarPseudostratified Columnar
• All of the Pseudostratified Columnar cells rest on a basement membrane, but rest at various heights
• Function in absorbtion and secretion
• All of the Pseudostratified Columnar cells rest on a basement membrane, but rest at various heights
• Function in absorbtion and secretionEpithelial Tissue
Stratified EpitheliaStratified Epithelia
• Contain two or more cells layers
• The major function of these cells is to protect
• Contain two or more cells layers
• The major function of these cells is to protect
Epithelial Tissue Stratified Squamous Stratified Cuboidal Stratified Columnar
Stratified SquamousStratified Squamous
• Composed of several cell layers
• Main purpose is protection
• Contain keratin, a protective protein
• Forms the external part of the skin
• Composed of several cell layers
• Main purpose is protection
• Contain keratin, a protective protein
• Forms the external part of the skinStratified Epithelia Stratified Cuboidal Stratified Columnar
Stratified CuboidalStratified Cuboidal
• Quite rare• Found in the
ducts of larger glands
• Quite rare• Found in the
ducts of larger glands
Stratified Epithelia Stratified Columnar Stratified Squamous
Stratified ColumnarStratified Columnar
• Found in the pharnyx, male urethra, and the lining of glandular ducts.
• Found in the pharnyx, male urethra, and the lining of glandular ducts.
Stratified Epithelia Stratified Cuboidal Stratified Squamous
Transitional EpitheliaTransitional Epithelia
• Lines the hollow urinary organs
• Basal layer is made up of columnar or cuboidal cells
• Stretch out when urine is going through the tubes
• Top cells are squamous like
• Lines the hollow urinary organs
• Basal layer is made up of columnar or cuboidal cells
• Stretch out when urine is going through the tubes
• Top cells are squamous like
Epithelial Tissue
Muscle TissueMuscle Tissue
• Highly cellular tissue
• Responsible for most types of body movement
• Possesses myofilaments
• Three categories-Skeletal, Muscular, and Smooth
• Highly cellular tissue
• Responsible for most types of body movement
• Possesses myofilaments
• Three categories-Skeletal, Muscular, and Smooth
Tissues Skeletal Muscle Cardiac Muscle Smooth Muscle
Skeletal Muscle TissueSkeletal Muscle Tissue
• Packed tightly by connective tissue sheets
• Attached to skeletal bones
• Form the flesh of the body
• Muscle cells contain muscle fibers
• Packed tightly by connective tissue sheets
• Attached to skeletal bones
• Form the flesh of the body
• Muscle cells contain muscle fibers
Muscle Tissue Smooth Muscle Cardiac Muscle
Cardiac MuscleCardiac Muscle
• Found only in the wall of the heart
• Contracts and propels blood through the blood vessels
• Uninucleate and have branching cells that fit together at intercalated discs
• Found only in the wall of the heart
• Contracts and propels blood through the blood vessels
• Uninucleate and have branching cells that fit together at intercalated discs
Smooth Muscle Skeletal Muscle Muscle Tissue
Smooth MuscleSmooth Muscle
• Has no striations• Found mainly in
the walls of hollow organs
• Main purpose is to squeeze substances through the muscles
• Has no striations• Found mainly in
the walls of hollow organs
• Main purpose is to squeeze substances through the muscles
Cardiac Muscle Skeletal Muscle Muscle Tissue
Nervous TissueNervous Tissue
• Nervous Tissue is the main component of the nervous system
• Contains neurons• Contain
supporting cells
• Nervous Tissue is the main component of the nervous system
• Contains neurons• Contain
supporting cells
Tissues
Connective TissueConnective Tissue
• Primary function is to support, protect, and bind together.
• Primary function is to support, protect, and bind together.
Tissues Bone Tissue Blood Tissue Connective Tissue Proper Cartilage
Blood TissueBlood TissueBlood does not connect anything or give support, but develops from a mesenchyme , consists of cells, and contains a matrix
Contains either red or white blood cells
Fibers are made of a soluble protein molecules that form clots
Functions include being the transport vehicle for the cardiovascular system, carrying nutrients, wastes, and respitory gases, and other substances throughout the body.
Connective Tissue
Bone TissueBone TissueBone tissues support and protect body structures
Bone matrix is similar to cartilage matrix, but is harder and more rigid
Contains osteoblasts, which produce the organic part of the matrix
Contains osteons which are formed by rings of bony matrix
Connective Tissue
Cartilage TissueCartilage TissueCartilage can withstand both tension and compression
Tough and flexible
Lacks nerve fibers, and recieves nutrients via diffusion by blood vessels
Contains chondroblasts which produce new matrix until the end of adolesence
Hyaline Cartilage Elastic Cartilage Fibrocartilage Connective Tissue
Hyaline CartilageHyaline CartilageThe most abundant cartilage in the body
Provides support with a bit of pliability
Found on the end of articular cartilage, the end of the nose, connects the ribs to the sternum, and supports the respitory passages
Most hyaline cartilage is formed in the embryonic skeleton
Cartilage Tissue Elastic Tissue Fibrocartilage
Elastic TissueElastic TissueNearly identical to hyaline cartilage, but contains more elastin fibers
Found where strength and and stretchibility are a must
Forms the ear and the epiglottis
Hyaline Cartilage Fibrocartilage Cartilage Tissue
FibrocartilageFibrocartilage
Fibrocartilage is a balance between both hyaline cartilage and elastic cartilage
Found where strong support and the bility to withstand pressure is required, like intervertebral discs and the cartilage of the knee
Hyaline Cartilage Elastic Cartilage Cartilage Tissue
Connective Tissue ProperConnective Tissue ProperContains two subclasses- Dense Connective and Loose connective
Connective Tissue Reticular Adiopose Areolar Regular Dense Irregular Dense
Recticular Connective Tissue
Recticular Connective Tissue
Resembles Areolar connective tissue
Fibers in this tissue are reticular fibers, which contain reticular cells in their network
Forms a labryinth like stroma that supports free blood cells in the lymph nodes, spleen, and bone marrow
Adiopose Areolar Regular Dense Irregular Dense
Adiopose Connective Tissue
Adiopose Connective Tissue
Similar to areolar tissue
Store much more energy than Areolar Connective tissue
Contain adiocytes and is very vascularized
Constitutes 18% of a persons body weight
Can develop almost anywhere, which some organs need to keep working
Also referred to as white adiopose tissue to distinguish it from brown adiopose tissue
Connective Tissue Proper Areolar Dense Regular Dense Irregular
Areolar Connective TissueAreolar Connective TissueFunctions include supporting and binding other tissues, holding body fluids, defending against infection, and storing nutrients
The most widely distributed connective tissue throughout the body
Adopose Reticular Dense Regular Dense Irregular Connective Proper
Regular Dense ConnectiveRegular Dense ConnectiveMainly made up of fiber, which run in the same direction.This gives a great resistance to tension
Contains fibroblasts that make the fibers
Form the tendons and aponeuroses and the fascia
Adopose Areolar Reticular Irregular Dense Connective Tissue Proper
Irregular Dense Connective Tissue
Irregular Dense Connective TissueHas the same makeup as the
regular variety, but the collagen fibers are arranged differently and the fibers are thicker
Forms where tension is exerted in more than one direction.
Found in the dermis, and the fibrous coverings of some organs
Connective Proper Adopose Areolar Reticular Dense Regular Dense Irregular