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Animal Tissues & Organ Systems Tissues Remember our levels of organization/complexity! Atom Molecule Cell Tissue Organ Organ System Cytology—Study
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- Animal Tissues & Organ Systems
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- Tissues Remember our levels of organization/complexity! Atom
Molecule Cell Tissue Organ Organ System CytologyStudy of cells
HistologyStudy of tissues
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- Tissues Tissue A group of similar cells united to perform a
specific function. Groups of cells having a similar structure and
function
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- Germ Layers Ectoderm epidermis, nervous system Endodermlinings
of digestive & respiratory tracts, & associated organs
Mesoderm Skeletal, muscular, circulatory systems
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- Tissue Types Epithelial Connective Muscle Nervous
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- Epithelial Tissues Line body cavities Line body tubes Form body
coverings Form many glands
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- Epithelial Tissues Characteristics Closely packed Tightly
connected Polarity Apical surface Basal Surface Avascular
Innervated High regeneration
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- Epithelial Tissues Classification Layers Simple Stratified
Pseudostratified Shape Squamous Cuboidal Columnar Transitional
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- Epithelial Tissues Simple Squamous Diffusion & filtration
Kidneys, air sacs, capillaries Simple Cuboidal Secrete & absorb
Kidneys, glands, ovaries
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- Epithelial Tissues Simple Columnar Absorption, secrete mucus
& enzymes Cilia on some for propulsion Digestive tract
(non-ciliated), bronchi & uterus (ciliated) Pseudostratified
Columnar Secretion, ciliated propulsion Respiratory tract, male
reproductive
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- Epithelial Tissues Stratified Squamous Protection from abrasion
Mouth, vagina, skin
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- Connective Tissues Most abundant Most diverse Extracellular
matrixnonliving substance separating living cells
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- Connective Tissues Loose connective tissue (fibroblasts) Dense
connective tissue (fibroblasts) Cartilage (chondrocytes) Bone
(osteocytes) Blood (hematopoetic stem cells)
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- Connective Tissues Loose Areolar Connect skin to tissues
Superficial coverings of some organs Adipose Energy storage
Cushioning Insulation
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- Connective Tissues Dense Irregularloosely packed Dermis Around
blood vessels Part of intestines Regulardensely packed Tendons
Ligaments
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- Connective Tissues Cartilage Hyaline Ends of bone Ribs to
sternum Elastic External ear Epiglottis
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- Connective Tissues Bone 30% collagen fibers 70% mineral salts
Support & protection
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- Connective Tissues Blood 55% plasma Water, proteins, other 45%
cells Erythrocytesred blood cells Oxygen transport Leukocyteswhite
blood cells Fight infection Clean up debris Thrombocytesplatelets
clotting
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- Muscle Tissues Movement Highly vascularized Actin & myosin
microfilaments
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- Muscle Tissues Skeletal muscle Multi-nucleated Long, parallel
fibers Striations Voluntary contractions
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- Muscle Tissues Cardiac muscle Only in the heart Branched fibers
Striations Intercalated discs Involuntary
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- Muscle Tissues Smooth muscle Spindle-shaped fibers No
striations Involuntary Blood vessels Walls of hollow organs
Gastrointestinal tract
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- Nervous Tissues Central nervous system Brain & spinal cord
Peripheral nervous system Fewest cell types Detects, interprets,
transmits, responds to stimuli Coordinates, regulates, integrates
body activities
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- Nervous Tissues Neurons Dentrites Axons
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- Nervous Tissues Neuroglial cells Support & nourish
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- Tissues to Organs Skin EpithelialStratified squamous, simple
cuboidal ConnectiveAdipose, areolar, dense irregular, blood
MuscleSmooth (arrector pili, blood vessels) Nervous
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- Organ Systems
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