A&P lab Flashcards
Name the 4 tissue categories
Connective tissue, Epithelial tissue, Nerve tissue, Muscle tissue
What is tissue?
Two or more cells that share a common structure, function, & embryological organ
What is epithelial tissue?
Composed of closely packed cells
Characteristics of epithelial tissue
Covers the body’s surface, lines internal cavities
Functions: Diffusion, secretion, absorption,filteration, protection
Connective tissue
is composed of a few cells surrounded by lots of extracellular matrix (fibers, fluids, minerals)
Mesenchyme
embryologic connective tissue
Characteristics of connective tissue
Most abundant tissue, found everywhere except for body surfaces
Bind, support, protect, insulate, transport
Connective tissues are made up of?
Ground substances, fibers, cells
Ground substance
is the unstructured material (fluid) that fills the space between the cells and contains the fibers. It is made up of interstitial fluid, cell adhesion proteins, and proteoglycans.
Extracellular matrix
is made up of the ground substance and the fibers.
What are the 3 types of fibers?
Collagen fibers, elastic fibers, reticular fibers
Collagen fibers
Most abundant; provide tensile strength; found in bone, cartilage, tendon, ligaments
Elastic fibers
Elastin protein allows them to stretch and recoil; found in skin, lungs, and blood vessel walls
Reticular fibers
Short, branching fibers that surround small blood vessels and support soft tissue of some organs
Types of loose connective tissue
Areolar, Adipose, Reticular
Types of dense connective tissue
Dense regular, Dense irregular
Three classes of cartilage
Hyaline, Elastic, Fibrocartilage
Simple squamous epithelium (structure)
Structure: one layer of flat cells
Simple cuboidal epithelium (structure)
Structure: one layer of cube-shaped cells
Simple columnar epithelium (structure)
Structure: one layer of column-shaped cells
Simple squamous epithelium (function)
Function: diffusion or filtration
Simple cuboidal epithelium (function)
secretion or absorption
Simple columnar epithelium (function)
Function: secretion or absorption
Location of simple squamous epithelium
lining blood capillaries, lining alveoli of lungs, filtration membrane of kidney, serous membranes of body cavities