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Histology
Notecards for histology
61
Biology
Undergraduate 3
09/26/2011

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Term
Tissue
Definition
An assemblage of cellular and fibrous elements, in which one particular type of cell predominates, organized to form the material basis of one of the functional systems of the body.
Term
Le Gros Clark
Definition
The man who came up with the formal definition of a tissue
Term
Histology
Definition
i. The study of anatomy at the tissue level of organization
Term
Epithelia
Definition
a. Sheetlike tissues that cover free surfaces or line ducts, sacs, or tubes, and are attached to a basement membrane.
Term
Basement Membrane
Definition
the deepest component of the membrane that connects the epithelium to underlying tissue
Term
Free Surface
Definition
the surface that interacts with the space the epithelium is interacting with
Term
4 Types of Stratification
Definition
Simple, Stratified, Pseudostratified, and Transitional
Term
Simple
Definition
One layer of cells attached to the basement membrane
Term
Stratified
Definition
More than one layer of cells
Term
Pseudostratified
Definition
All the cells attach to the basement membrane but only some reach the free surface
Term
Transitional Stratification
Definition
specialized form lining the urinary bladder and capable of great distention
Term
The 3 Cell Shapes
Definition
Squamous, Cuboidal, Columnar
Term
Squamous
Definition
the cells are flat (wider than they are tall)
Term
Cuboidal
Definition
cells in a cube-shaped
Term
Columnar
Definition
cells column-like (taller than wide)
Term
5 Types of Cell Specialization
Definition
Glandular, Ciliated, Sensory, Cornified, Absorptive
Term
Glandular
Definition
A cell specialization that secretes products
Term
Ciliated
Definition
A cell specialization that has cilia
Term
Sensory Cell
Definition
A cell specialization that senses stimuli
Term
Cornified
Definition
A cell specialization that is impregnated with keratin
Term
Absorptive Cell
Definition
A cell specialization that increases surface area for absorption
Term
Goblet Cell
Definition
Unicellular gland typical of glandular epithelia
Term
Glands
Definition
Organs that secret products and are derived from epithelia
Term
Endocrine Gland
Definition
secrete products directly into the bloodstream (e.g., thyroid, adrenal); ductless. Not connected to the epithelium
Term
Exocrine Gland
Definition
secrete products through a duct onto a free surface (e.g. liver, pancreas). connected to the epithelium.
Term
Multicellular Gland
Definition
A gland that secretes products and made up of more than one cell
Term
Types of Gland branching
Definition
Simple (unbranched) and Compound (branched)
Term
Types of Glandular lobes
Definition
Tubular and Alveolar
Term
Alveolar Gland
Definition
Type of exocrine gland that is wide
Term
Tubular Gland
Definition
Type of gland that is taller than wide
Term
3 Types of Secretion
Definition
Merocrine, Apocrine, and Holocrine
Term
Merocrine Secretion
Definition
Have cells that secrete products by exocytosis
Term
Holocrine Secretion
Definition
The entire cell is sloughed off, and then it breaks, releasing product
Term
Apocrine Secretion
Definition
Where the tip of the cell breaks off, releasing product
Term
Exocytosis
Definition
Vesicles containing product fuse with the plasma membrane to release product
Term
Apo
Definition
Tip
Term
Holo
Definition
Entire
Term
Mesenchyme
Definition
Primarily an embryonic tissue that differentiates early in development and gives rise to various mature tissues. It is irregular, star-shaped cells with large intercellular spaces
Term
The 5 cellular components of adult connective tissues
Definition
Fibroblasts, Macrophages, Mast cells, Fat cells, and Plasma Cells
Term
Fibroblasts
Definition
They make fibers; collagenous, elastic, and reticular fibers. Also secretes ground substance.

Secrete ground substance
Term
Macrophages
Definition
1) Phagocytic cells that engulf cells by phagocytosis. Aka immune cells.
Term
Mast Cells
Definition
Immune system cells that produce histamine, that has an effect on the walls of cells that lets them leak plasma.
Term
Fat Cells
Definition
Cells filled with lipids inside a huge vacuole
Term
Plasma Cells
Definition
They are leukocytes, aka white blood cells
Term
Extracellular Components
Definition
All produced by the Fibroblasts. They are reticular fibers, collagenous fibers, elastic fibers, and ground substance
Term
The two types of connective tissue
Definition
Loose connective tissue and Dense connective tissue
Term
Collagenous fibers
Definition
Fibers containing collagen, a protein with a high resistance to stretching.
Term
Reticular Fibers
Definition
Fibers that are very thin that is in loose connective tissue
Term
Elastic fibers
Definition
Made of elastin that are capable of stretching and rebounding to original conformation
Term
Ground substance
Definition
Fluid diffusion medium of connective tissues
Term
Loose connective tissue
Definition
Characterized by loose networks of collagenous and some elastic and reticular fibers. Also has quite a bit of ground substance.
Term
Dense connective tissue
Definition
Made up of almost exclusively fibers, (ligaments, tendons, joints). It has very few cells and in some instances no cells and very little ground substance
Term
Tendons
Definition
Dense connective tissues that link muscles to bone
Term
Ligaments
Definition
Connect two skeletal components
Term
Supporting Tissues
Definition
Bone, cartilage, and notochordal tissues. Have extensive semisolid intercellular matrix
Term
The 3 Types of Muscle
Definition
Smooth, Skeletal, and Cardiac
Term
Smooth Muscle
Definition
Slow-acting, and under involuntary control; lining of the gut, ducts, vessels etc. Fibers contract slowly and retract slowly
Term
Skeletal Muscle
Definition
Fast-acting conscious and reflex control; associated with skeleton, locomotion, etc. Consist of twitch fibers, that act fast and relax fast
Term
Cardiac Muscle
Definition
Fast-acting, involuntary; heart only, Makes up the myocardium and you can not control the contraction
Term
Nervous tissue
Definition
Consist of neurons and accessory elements (e.g. neuroglia)
Term
The 6 Types of Tissue
Definition
Blood and related tissue, Connective Tissue, Muscle Tissue, Nervous Tissue, Epithelial Tissue, Supporting Tissues
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