Levels of Organization
A group of similar cells performing the same function.
Tissue
Tissue that covers body surfaces and lines cavities.
Epithelial tissue (epithelium)
Tissue that binds, supports, and protects body parts.
Connective tissue
Three types of muscle tissue.
Skeletal, cardiac, and smooth
Functional cell of nervous tissue.
Neuron.
Structure made of multiple tissue types.
Organ.
Simple epithelium consists of how many cell layers?
One layer
Nonliving material surrounding connective tissue cells.
Matrix
Voluntary muscle attached to bones.
Skeletal muscle
Extension that carries impulses toward the cell body.
Dendrite.
Group of organs working together.
Organ system
Flattened epithelial cells found in lungs and blood vessels.
Squamous epithelium
Protein that gives connective tissue strength.
Collagen
Involuntary muscle found only in the heart.
Cardiac muscle
Extension that carries impulses away from the cell body.
Axon.
Biological phrase meaning structure determines function.
"Structure equals function."
Epithelium that appears layered but is actually one layer.
Pseudostratified epithelium
Connective tissue that stores fat and cushions organs.
Adipose Tissue
Involuntary, nonstriated muscle found in organs and blood vessels.
Smooth muscle
Cells that form the myelin sheath around axons.
Schwann cells.
Name the four major tissue types.
Epithelial, connective, muscular, and nervous
Compare squamous, cuboidal, columnar, and pseudostratified epithelium.
Squamous: flat cells;
Cuboidal: cube-shaped;
Columnar: tall cells;
Pseudostratified: one layer that appears multilayered due to nuclei at different heights.
Compare loose connective, dense connective, adipose, bone, cartilage, and blood.
Loose: binds tissues;
Dense: tendons & ligaments;
Adipose: fat storage;
Bone: support/mineral storage;
Cartilage: flexible support; Blood: transport & defense.
Compare skeletal, cardiac, and smooth muscle.
Skeletal: voluntary, striated, multinucleate.
Cardiac: involuntary, striated, branched, intercalated disks. Smooth: involuntary, nonstriated, spindle-shaped.
Name the three parts of a neuron and their functions.
Dendrites: receive signals.
Cell body: contains nucleus and integrates information.
Axon: sends impulses away from the cell body.