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50 Cards in this Set
- Front
- Back
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Histology
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study of tissues
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Tissue
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group of cells that are smiliar in structure and function
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Epithelial Tissue
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a sheet of cells that covers a body surface or lines a body cavity examples are skin, open cavities and covers the walls of organs
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Functions of Epithelium (FAPESS)
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Protection
Absorption Filtration Excretion Secretion Sensory reception |
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Epitheliums 2 names
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number of cells it respresents
shape of its cells |
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Simple Epithelia
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one layer, absorbtion, secretion, and filtration
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Simple Squamous Epitheluim
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flattened laterally, endothelium, mesothelium/ found in walls of the smallest ducts of glands
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Simple columar epithelium
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goblet cells found in the digestive track, they secrete protective mucous
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Pseudostratified Columar epithelium
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respiratory
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Stratified Epithelia
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Contains 2 or more cell layers, regenerate from below, protection
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Stratified Squamous Epithelia
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forms skin and extents shortly into every bodily cavity cavity most widespread throughout the body
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Stratified ciboidal epithelium
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found in ducts of large glands example, sweat glands
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Stratified Columnar epithleia
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found in the pharynx, male uretlra, and lines some glandular ducts
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Transitional epithelium
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found in lining of bladder the change shape according to amt of urine
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Gland
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consists of one or more cells that make and screte a particular product
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Glandular Epithlelia
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unicellular and multicellular
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Endocrine Glands
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produce hormones
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Hormones
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regulatory chemicals that are secreted by exocytosis into the extracellular space
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Exocrine Glands
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many more then endocrine, include mucous, sweat, oil, saliva
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Unicelluar exocrine glands
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goblet cells
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Multicellular Exocrine Gland
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have 2 parts, duct and secretory unit
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Connective tissue Major functions
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binding and support
protection insulation transportation |
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Structural Elements of CT
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ground substance
fibers cells |
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ground substance
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unstructured material that fills the space between the cells and contains the fibers
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Three types of fibers
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collagen
elastic reticular |
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collagen fibers
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extremely tough, white fibers, provide high tensile strenght
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elastic fibers
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long and thin, found in skin, lungs, and blood vessel walls, yellow fibers
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Reticular fibers
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fine collagenous fibers
form networks that surround small blood vessels and spport the soft tissue of organs |
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Cells of CT
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Connective Tissue Proper
fibroblast Cartilage chondroblast Bone osteoblast Blood hematopoietic stem cell |
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Areolar Tissue (loose)
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connects and binds, stores fluid, defends against infection, stores nutrients as fat.
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Adipose (fat) tissue (loose)
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nutrient storage, richly vasularized and made of adipocytes
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Reticular connective tissue (loose)
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forms stroma to support free blood cells in the lymph nodes, spleen, and bone marrow
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Dense Regular
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forms tendons and ligaments
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Dense Irregular
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thicker then dense, found in skin, forms fibrous joint capsules and fibrous coverings in some organs
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Cartilage
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stands up to tension and compression
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Hyaline Cartilage
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provides support with some piliability, makes up nose, connects ribs to sternum, supports respitory system
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Elastic Cartilage
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nearly identical to hylaline, forms skeletons of ear, forms the windpipe
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Fibrocartilage
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found where hyaline meets a true ligament or tendon, provides strong support and the ability to withstand heavy pressure
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Osteblasts
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make bone
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osteocytes
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maintain bone
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Cutaneous membran
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skin
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Mucous membrane
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nose, mouth, ears
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serous membrane
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found in ventral body cavity
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Neurons
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generate and conduct nerve impulses
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Muscle tissue
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highly cellular and possesses myofilaments
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Skeletal Muscle
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attached to the bones
cause body movements by pulling on bone and skin, muscle fibers have a STRIATED appearance |
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Cardiac Muscle
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found in wall of heart, involuntary, striated
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Smooth muscle
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found in walls of organs, squeezes substances through the organs by contracting and relaxing, involuntary muscle
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Steps of tissue Repair
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inflammation
restoration of blood supply regeneration |
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Three germ layers
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ectoderm
mesoderm endoderm |
