Download Animal tissue

Animal tissue
Heba Al-Tamimi 
Tissues:
Simply groups of similar cells that work
together performing the same task
Histology:
the science deals with study of animal
tissues.
Cell
tissues
organs
system
organism
Organs are composed of four basic tissue types:
 Epithelial tissues
 Connective tissues
 Muscular tissues
 Nervous tissue
Epithelial Tissues
There are different types of epithelia, but all share
the following common features:
Have one free surface
Lack blood vessels
Have little intercellular spaces
And attach to a basement membrane
Epithelial Tissue
Epithelial tissues either cover body surface (as skin) or line
tubular organs (as intestine )
These tissues serve one or more of the following functions
Protection
Secretion
Absorption
Sensation
reproduction
Epithelial Tissues
Simple Squamous Epithelium
Squamous Cells
Alveoli in lung
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Simple Cuboidal Epithelium
Cuboid Cells
Kidney tubules
Thyroid follicles
Connective
tissues (C.T)
Special
C.T
General
C.T
Loose C.T
(Areolar)
Dense
C.T
adipose
Blood
Cartilage
Bone
(hyaline)
(compact)
Connective Tissue
Characterized by the cells widely separated from
each other in a matrix that is produced by the cells.
This tissue consist from
Cell Matrix (Ground)
Liquid (sol), Gel, Gum or solid
Fibers
Collagen (white fiber)
wavy appearance ,bundle shape
Elastic yellow fibers)
triad like ,branch
Cell :depends on the type of connective tissue
Loose Connective Tissue (Areolar)
Gel like matrix with both elastic and collagen fibers
running though the ground substance in many
directions.
Cells : fibrocytes
Location : mesentery
Dense Regular Connective Tissue
Tightly packed collagen fibers
Matrix : gel-like
Cells :fibrocytes
Location : tendon
Fibrocyte nucleus
Collagen
Adipose Tissue
Function as storage cells for lipids
Adipose cells contain a large vacuole which in the
living cell contains lipids.
Cell nucleus and cytoplasm are pushed out to
edge of cell membrane.(peripheral)
Blood
Liquid matrix = plasma
Cell :
Erythrocytes
Lymphocyte
Erythrocyte
Platelets (small cytoplasmic fragment)
No fiber
Neutrophil
Lymphocyte
Monocyte
Cartilage (hyaline)
matrix is semisolid.
Cells (Chondrocytes) are
found in Lacunae within the
matrix.
NO Fiber
Chondrocyte
Matrix
Bone (compact )
matrix is Solid due to deposition of Calcium- phosphate salt
called hydroxyapatite.
Has blood supply and nerves running through the Haversian
canal systems to cells (osteocytes) found inside lacunae .
Muscle Tissue
Skeletal Muscle (Striated, voluntary)
Parallel elongated cells (Muscle fibers)
multinucleated and each cell is the length of the muscle
Nervous tissue
Nervous tissues are found in brain ,spinal cord ,nerves and
reach all organs
The tissues consist of:
Neurons which are specialized in transmitting information
Neuroglia support neural tissue and help supply nutrients to
neurons
Nervous tissue
A neuron consist of :Cell body
Axon
Dendrites
Nervous tissue
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