Tissue Concept Flashcards
are aggregates or group of cells to organized to perform one or more specific functions
Tissues
french word that means woven
tissu
Latin word that means to weave
texo
Four basic types of tissues
Epithelial Tissue
Connective Tissue
Muscular Tissue
Nervous Tissue
Tissue contains what two components?
Cells
Extracellular Matrix
Cells are intertwining elongated process
Nervous Tissue
No Extracellular Matrix
Nervous Tissue
Main Function - Transmission of nervous impulses
Nervous Tissue
Cells are aggregated polyhedral cells
Epithelial Cells
Small amount of Extracellular Matrix
Epithelial Tissue
Living of surface or body cavities (for covering), glandular secretion
Epithelial Tissue
Elongated contractile cells
Muscle Tissue
Moderate Extracellular Matrix
Muscle Tissue
Main Function is for movement/locomotion
Muscle tissue
Several types of fixed and
wandering cells
Connective Tissue
Abundant amount of Extracellular Matrix
Connective tissue
Support (underlying our epithelial tissue is our connective tissue, providing the necessary nutrients that the epithelium needed for metabolism) and protection
Connective Tissue
is characterized by close cell apposition and presence at a free surface
Epithelium
whether arranged in a single layer or in multiple layers, are always contiguous with one another
Epithelial cells
they are usually joined by specialized cell-to-cell junctions that create a barrier between the free surface and the adjacent connective tissue
Epithelium
The__________________ between epithelial cells is minimal and devoid of any structure except where junctional attachments are present
intercellular space
Cell shapes include:
Squamous (flattened)
Cuboidal (almost have equal sides)
Columnar (they are taller than they are wide)
Layers are described:
Simple (single layer)
Stratified (multiple layers)
Pseudostratified (stratified because iba iba ang height ng cell making their nuclei in different levels, giving an impression that they’re multiple layers but they’re only a single layer because they’re from only one base)
three germ layers includes:
Ectoderm
Mesoderm
Endoderm
is the outermost of the three
germ layers.
ectoderm
major classes of ectoderm
– surface ectoderm
– neuroectoderm
SURFACE ECTODERM gives rise to:
– epidermis and its derivatives (hair, nails, sweat glands,
– Sebaceous glands
– Parenchyma and ducts of the mammary glands),
– cornea and lens epithelia of the eye
– enamel organ and enamel of the teeth
– components of the internal ear
– adenohypophysis (anterior lobe of pituitary gland)
– mucosa of the oral cavity
– lower part of the anal canal.
NEUROECTODERM gives rise to:
– the neural tube and its derivatives, including components of the central nervous system, ependyma (epithelium lining the cavities of the
brain and spinal cord), pineal body, posterior lobe of pituitary gland (neurohypophysis), and the sensory epithelium of the eye, ear, and nose;
– the neural crest and its derivatives, including components of the peripheral nervous system..
is the middle of the three primary
germ layers of an embryo.
Mesoderm
Mesoderm gives rise to:
– Connective tissues
– Striated muscles and smooth muscles
– Heart, blood vessels, and lymphatic vessels
– Spleen
– Kidneys and gonads
– Mesothelium
– Adrenal cortex
is the innermost layer of the three germ layers forming the wall of the primitive gut and gives rise to epithelial portions or linings of the organs arising from the primitive gut tube in primitive embryo
Endoderm
Derivatives of the endoderm include:
– alimentary canal epithelium
– extramural digestive gland epithelium
– lining epithelium of the urinary bladder and most of the urethra;
– respiratory system epithelium
– thyroid, parathyroid, and thymus gland epithelial components
– parenchyma of the tonsils
– lining epithelium of the tympanic cavity and auditory (Eustachian) tubes.
