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Anatomy
SAHS Anatomy Honors
Term | Definition |
---|---|
Epithelial | covers the body and its parts; one of the 4 main tissue types; protect, sensory function,secretion, absorption, excretion; two types; simple and stratified |
Connective Tissue | most abundant and widely distributed tissue in the body; one of the 4 main tissue types |
Muscle | specialized tissue type that produces movement; one of the 4 main tissue types |
Nervous | specialized tissue type consisting of neurons and glia that provides rapid communication and control of body function; one of the 4 main tissue types |
Extra cellular Matrix | is a complex non living material between cells and tissue |
ECM | serves as a structural element in tissues and also influences their development and physiology |
Endoderm | innermost layer of the primary germ layers; develops into the digestive and urinary structures, as well as many other glands and organ parts |
Mesoderm | middle layer of primary germ layers; develops into muscles bones and blood vessels |
Ectoderm | outermost of the primary germ layers; develops into skin and the nervous system |
Gastrulation | process by which blastocyst cells move and then differentiate into the three primary germ layers |
Histogenesis | formation of tissues from primary germ layers of embryo |
Characteristics of Epithelial Tissue | limited amount of matrix material, membranous type attached to a basement membrane, avascular, cels are in close proximity, capable of reproducing itself |
Epithelial Tissue Shapes | simple, stratified, glandular |
Stratified Squamous | keratin filled; free surface is moist and found in mouth, esophagus, vagina |
Simple Squamous | permeable to many substances |
Pseudostratified Columnar | all cells rest on the basement membrane but may not reach the free surface above;cell nuclei are at odd & irregular intervals; very rarely found; only in segments of male urethra |
Simple Cuboidal | found in many ducts |
Stratified Transitional | 10 or more layers thick; protect organ walls from tearing & stress |
Apocrine Glands | found in mammary glands |
Merocrine Glands | are the most prevalent glands; no damage to cell membrane and no loss of cytoplasm |
Holocrine Glands | damage to cell membrane and some loss of cytoplasm; found in sebaceous glands; cell ruptures and dies after secretions are released |
Fibrous Tissue | a type of connective tissue; that make up tendons, bone (hard calcified, cartilage (consistency is firm, plastic, or gristle like gel) |
Loose, Ordinary Connective Tissue | loose connective |
Adipose Connective Tissue | provides insulation, support, and food reserves |
Reticular Connective Tissue | consists of network of branching fibers; forms framework of spleen; provides defense against microorganisms |
Dense Connective Tissue | found in regular and irregular arrangements in tendons, ligaments and kidney capsule |
Cartilage | avascular, heals slowly after injury |
Blood | contains neither ground substance nor fibers |
Bone | formed by osteocytes |
Hyaline | shiny and translucent appearance |
Fibrocartilage | strongest and most durable type of cartilage; found in intervertebral disks |
Elastic Cartilage | cartilage found in ear and larynx |
Plasma | is the blood cells; 55% whole blood, 45% formed elements |
Erythrocytes | red blood cells |
Leukocytes | White Blood Cells |
Thrombocytes | platelets |
Skeletal | thread like cells with many cross striations; one nucleus per cell; voluntary muscle tissue, uninucleate |
Smooth | elongated, narrow cells, no cross striations, one nucleus per cell; voluntary muscle tissue, uninucleate |
Cardiac | branching cells with intercalated disks; involuntary muscle tissue; striated muscle tissue, connecting the branching cells |
Nervous Tissue | rapid regulation and integration of bode activities; brain, spinal cord, nerves; excitability, conductivity |
Neuron | 1 type of nervous tissue |
Neuroglia | is a type of nervous tissue |
Axon | transmits nerve impulses away from cell body |
Dendrites | carry nerve signals toward the axon |
Regeneration | new tissue growth |
A Scare | dense fibrous mass |
Keloid Scar | an unusual thick scar |