Ch4 Definitions Flashcards
Characteristics of epithelial tissue
Polarity: apical and basal
Apical has lumen
Avascular
High regeneration
Single layer of cells
Simple epithelial tissue
Many layers of cells
Stratified epithelial tissue
Flat cells w disc shaped nuclei
Squamous
Cube shaped cells
Cuboidal
Taller than wide like columns
Columnar
Cells w different heights but all rest of basement membrane
Pseudostratified epithelium
Lines urinary bladder, when stretches apical cross flatten, when relaxed apical balloon out
Transitional epithelium
Lack ducts produce hormones (long distance) enter through blood
Endocrine glands
Secrete products onto body surface act near local area
Exocrine glands
Produce mucin, lubricates internal body surfaces
Goblet cells
Located near apical, prevent molecules from passing bw cells by forming a seal bw cells
Tight junctions
Hold adjacent cells together
Desmosomes
Intercellular communication bw neighboring cells
Gap junctions
Composed of glycoproteins and collagen attachment site for epithelium fibers belong to underlying connective tissue
Basal lamina
Hairlike extensions of apical composed of actin micro filaments longest and most abundant on epithelia absorb nutrients
Microvilli
Whip like motile extensions in respiratory tract, microtubules arranged in 9+2 array
Cilia
Autosomal recessive disorder has absent dynein arms
Kartagener syndrome
Characteristics of connective tissues
Few cells and abundant ECM
composed of ground substance and protein fibers
Types of protein fibers: collagen, reticular, elastic
Connective tissue proper
Fibroblasts
Cartilage
Chondroblasts
Bone
Osteoblasts
Adipose cells
Fat, store lipids
Strongest and most abundant, structural integrity
Collagen
