animal tissues & organ systems tissues remember our levels of organization/complexity! atom ...
TRANSCRIPT
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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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