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Principal Types of Tissue Epithelial Connective Muscle Nervous Epithelial Connective Muscle Nervous
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Extracellular Matrix Non-living material that surrounds living cells Helps bind tissues together Non-living material that surrounds living cells Helps bind tissues together
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Embryological development of Tissues Primary germ layers Endoderm Mesoderm Ectoderm Differentiation Primary germ layers Endoderm Mesoderm Ectoderm Differentiation
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EpithelialTissue
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Simple Squamous
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Simple Cuboidal
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Simple Columnar
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Stratified Squamous
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Glandular Epithelial Tissue - Apocrine, Holocrine, Merocrine
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Connective Tissue General function - connect, support, transport, protect General characteristics: lots of matrix, can be fluid, gel, or solid Four types Fibrous Bone Cartilage - Blood General function - connect, support, transport, protect General characteristics: lots of matrix, can be fluid, gel, or solid Four types Fibrous Bone Cartilage - Blood
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Loose Fibrous(areolar) Widely distributed Collagenous and elastic fibers in a ground substance Cells: fibroblasts, macrophages, mast cells, plasma cells, fat cells, and white blood cells Function - stretchy, flexible connection Widely distributed Collagenous and elastic fibers in a ground substance Cells: fibroblasts, macrophages, mast cells, plasma cells, fat cells, and white blood cells Function - stretchy, flexible connection
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Dense fibrous tissue Matrix - densely packed fibers Can be irregular or regular Locations - tendons and ligaments, dermis, kidney, spleen Function - flexible connections that are strong and stretchy Matrix - densely packed fibers Can be irregular or regular Locations - tendons and ligaments, dermis, kidney, spleen Function - flexible connections that are strong and stretchy
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Dense Fibrous - Ligaments
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Adipose Fibrous Tissue - similar to loose connective Mainly fat cells Functions - insulation, protection, support and food reserve Mainly fat cells Functions - insulation, protection, support and food reserve
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Adipose locations
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Fibrous Reticular Tissue Framework of spleen, lymph nodes, bone marrow Consists of Fibers and reticular cells Functions - defense from invading microorganisms (filters out bad stuff) Framework of spleen, lymph nodes, bone marrow Consists of Fibers and reticular cells Functions - defense from invading microorganisms (filters out bad stuff)
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Bone Tissue specialized tissue Cells - osteocytes in calcified matrix Matrix makes up 65% Functions - support, protection, attachment for muscles, reservoir for minerals, support blood forming tissue specialized tissue Cells - osteocytes in calcified matrix Matrix makes up 65% Functions - support, protection, attachment for muscles, reservoir for minerals, support blood forming tissue
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Compact bone Cells - osteocytes Osteon (haversian system) Lacunae (spaces for the osteocytes)and Lamellae(matrix in concentric rings Canaliculi - channels that join lacunae with central canal Central canal - Haversian canal Cell types osteocyte, osteoblast, bone forming cell Osteoclast - bone destroying cell Cells - osteocytes Osteon (haversian system) Lacunae (spaces for the osteocytes)and Lamellae(matrix in concentric rings Canaliculi - channels that join lacunae with central canal Central canal - Haversian canal Cell types osteocyte, osteoblast, bone forming cell Osteoclast - bone destroying cell
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Bone formation - ossification From membranes - Membranous bones - skull From cartilage - Endochondral bones - others From membranes - Membranous bones - skull From cartilage - Endochondral bones - others
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Spongy bone (cancellous) Trabeculae - thin beams of bone Supports Red bone marrow Trabeculae - thin beams of bone Supports Red bone marrow
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Cartilage Cell - chondrocyte (Housed in lacunae) Characteristics: Avascular Heals slowly Perichondrium - membrane that surrounds cartilage Cell - chondrocyte (Housed in lacunae) Characteristics: Avascular Heals slowly Perichondrium - membrane that surrounds cartilage
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Types Hyaline - ends of bones Fibrocartilage - strong, found in intervertebral disks and pubic symphysis) Elastic - contains elastic fibers. For strength and flexibility. Located in external ear and larynx Hyaline - ends of bones Fibrocartilage - strong, found in intervertebral disks and pubic symphysis) Elastic - contains elastic fibers. For strength and flexibility. Located in external ear and larynx
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Blood Liquid tissue Made in bone marrow (hematopoesis) No ground substance nor fibers Liquid tissue Made in bone marrow (hematopoesis) No ground substance nor fibers
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Blood composition Plasma - liquid (55%) Erythrocytes - red Leukocytes - white Platelets (thrombocytes) used for coagulation Plasma - liquid (55%) Erythrocytes - red Leukocytes - white Platelets (thrombocytes) used for coagulation
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Blood Functions Transportation Regulation of temperature Regulations of ph Destruction of bacteria Transportation Regulation of temperature Regulations of ph Destruction of bacteria
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Muscle Skeletal - striated, voluntary, multinucleated Smooth - nonstriated, involuntary, single nuclei Cardiac - striated, involutary, contains intercalated discs Skeletal - striated, voluntary, multinucleated Smooth - nonstriated, involuntary, single nuclei Cardiac - striated, involutary, contains intercalated discs
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Skeletal Muscle tissue
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Smooth Muscle tissue
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Cardiac muscle tissue
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Nervous tissue Functions - regulation and integration of body activities Specialized characteristics Excitability conductivity
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Structures of Nervous system Brain Spinal cord Nerves Neurons (functional unit) Axons Cell body Dendrites Brain Spinal cord Nerves Neurons (functional unit) Axons Cell body Dendrites
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Body membranes Definition of membrane Types Cutaneous membrane (skin) Serous membrane Parietal - lines cavity Visceral - covers organs Pleura - in lung Peritoneum - in abdomen Mucous membrane Connective tissue membrane synovial Definition of membrane Types Cutaneous membrane (skin) Serous membrane Parietal - lines cavity Visceral - covers organs Pleura - in lung Peritoneum - in abdomen Mucous membrane Connective tissue membrane synovial
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How an injury heals 1. capillaries constrict 2. Platelets stick to edges and clot forms – seal off injury 3. scab forms – protect injury 4. debris is cleaned out – macrophages eat away damaged tissue to leave room for repair 1. capillaries constrict 2. Platelets stick to edges and clot forms – seal off injury 3. scab forms – protect injury 4. debris is cleaned out – macrophages eat away damaged tissue to leave room for repair
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5. Organization of tissue parts – granulation occurs (a type of intermediate tissue) 6. Macrophages digest & remove original clot 7. Surface epithelium regenerates – scab usually falls off at this time End result: Healed injury! 5. Organization of tissue parts – granulation occurs (a type of intermediate tissue) 6. Macrophages digest & remove original clot 7. Surface epithelium regenerates – scab usually falls off at this time End result: Healed injury!
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Healing of Tissue
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Pathology of tissue Tumor - neoplasm - abnormal cell growth Benign - does not spread Malignant - spreads Causes Genetic Carcinogens Age Abuse of body Tumor - neoplasm - abnormal cell growth Benign - does not spread Malignant - spreads Causes Genetic Carcinogens Age Abuse of body
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Detection Self exam Medical imaging Blood tests Biopsy Treatment Chemotherapy Radiation therapy Laser therapy Immunotherapy Detection Self exam Medical imaging Blood tests Biopsy Treatment Chemotherapy Radiation therapy Laser therapy Immunotherapy
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