TAMU BIOL 319 LAB PRACTICAL 1 (1-5)
Histology - ANSWER: The study of tissues
Epithelial, connective, muscle and neural - ANSWER: 4 major types of tissues:
Epithelial Tissue - ANSWER: Line and cover organs as well as their internal passageways. Made of sheets of
cells, joined tightly together via strong intercellular connections.
yes - ANSWER: Are Epithelial tissues avascular?
Simple squamous epithelium - ANSWER: Description: Single layer of flattened cells with disc-shaped central
nuclei and sparse cytoplasm; the simplest of this type of tissue.
Function: Allows passage of materials by diffusion and filtration in sites where protection is not important;
secretes lubrication substances in serosae
Location:Found in the kidney glomeruli; air sacs of the lungs; lining of the heart, blood vessels and lymphatic
vessels; lining of mental body cavity.
Simple cuboidal epithelium - ANSWER: Description: Single layer of cube-like cells with large, spherical central
nuclei
Function: Secretion and absorption
Location: Kidney tubules; ducts and secretory portions of small glands; ovary surface
Simple columnar epithelium - ANSWER: Description: Single layer of tall cells with round to oval nuclei; some
cells bear cilia; layer may contain mucus-secreting unicellular glands (goblet cells)
Function: Absorption; secretion of mucus, enzymes and other substances; ciliated type propels mucus (or
reproductive cells) by ciliary action
, Location: Conciliated type lines most of the digestive tract (stomach to anal canal), gallbladder and excretory
ducts of some glands; ciliated variety lines small bronchi, uterine tubes and some regions of the uterus
Stratified squamous epithelium - ANSWER: Description: thick membrane composed of several layers; basal
cells are cuboidal or columnar and metabolically active; surface cells are squamous; in the keratinized type,
the surface cells are full of keratin and dead; basal cells are active in mitosis and produce the cells of the more
superficial layers
Function: Protects underlying tissues in areas subjected to abrasion
Location: Nonkeratinized type forms the moist linking of the esophagus, mouth and vagina; keratinized variety
forms the epidermis of the skin, a dry membrane.
Pseudostratified ciliated columnar epithelium - ANSWER: Description: Single layer of cells of differing heights,
some not reaching the free surface; nuclei seen at different level; may contain mucus-secreting cells and bear
cilia
Function: Secretion, particularly of mucus; propulsion of mucus by ciliary action
Location: Conciliated type in males' sperm-carrying ducts and ducts of large glands; ciliated variety lines the
trachea, most of the upper respiratory
Transitional epithelium - ANSWER: Description: resembles both stratified squamous and stratified cuboidal;
basal cells cuboidal or columnar; surface cells dome shaped or squamous-like, depending on degree of organ
stretch
Function: Stretches readily and permits dissension of urinary organ by contained urine
Location: Lines the ureters, urinary bladder and part of the urethra
Connective tissue - ANSWER: Provides the body with structural support and a means of joining structural
support and a means of joining structural components to one another
Histology - ANSWER: The study of tissues
Epithelial, connective, muscle and neural - ANSWER: 4 major types of tissues:
Epithelial Tissue - ANSWER: Line and cover organs as well as their internal passageways. Made of sheets of
cells, joined tightly together via strong intercellular connections.
yes - ANSWER: Are Epithelial tissues avascular?
Simple squamous epithelium - ANSWER: Description: Single layer of flattened cells with disc-shaped central
nuclei and sparse cytoplasm; the simplest of this type of tissue.
Function: Allows passage of materials by diffusion and filtration in sites where protection is not important;
secretes lubrication substances in serosae
Location:Found in the kidney glomeruli; air sacs of the lungs; lining of the heart, blood vessels and lymphatic
vessels; lining of mental body cavity.
Simple cuboidal epithelium - ANSWER: Description: Single layer of cube-like cells with large, spherical central
nuclei
Function: Secretion and absorption
Location: Kidney tubules; ducts and secretory portions of small glands; ovary surface
Simple columnar epithelium - ANSWER: Description: Single layer of tall cells with round to oval nuclei; some
cells bear cilia; layer may contain mucus-secreting unicellular glands (goblet cells)
Function: Absorption; secretion of mucus, enzymes and other substances; ciliated type propels mucus (or
reproductive cells) by ciliary action
, Location: Conciliated type lines most of the digestive tract (stomach to anal canal), gallbladder and excretory
ducts of some glands; ciliated variety lines small bronchi, uterine tubes and some regions of the uterus
Stratified squamous epithelium - ANSWER: Description: thick membrane composed of several layers; basal
cells are cuboidal or columnar and metabolically active; surface cells are squamous; in the keratinized type,
the surface cells are full of keratin and dead; basal cells are active in mitosis and produce the cells of the more
superficial layers
Function: Protects underlying tissues in areas subjected to abrasion
Location: Nonkeratinized type forms the moist linking of the esophagus, mouth and vagina; keratinized variety
forms the epidermis of the skin, a dry membrane.
Pseudostratified ciliated columnar epithelium - ANSWER: Description: Single layer of cells of differing heights,
some not reaching the free surface; nuclei seen at different level; may contain mucus-secreting cells and bear
cilia
Function: Secretion, particularly of mucus; propulsion of mucus by ciliary action
Location: Conciliated type in males' sperm-carrying ducts and ducts of large glands; ciliated variety lines the
trachea, most of the upper respiratory
Transitional epithelium - ANSWER: Description: resembles both stratified squamous and stratified cuboidal;
basal cells cuboidal or columnar; surface cells dome shaped or squamous-like, depending on degree of organ
stretch
Function: Stretches readily and permits dissension of urinary organ by contained urine
Location: Lines the ureters, urinary bladder and part of the urethra
Connective tissue - ANSWER: Provides the body with structural support and a means of joining structural
support and a means of joining structural components to one another
