LAB 3 - ANIMAL TISSUES Flashcards
Tissues line body surfaces and cavities, as well as form glands. The cells of the
tissue are closely connected to each other via cellular junctions and because epithelium is found
on the edges of organs, it has two distinct surfaces.
Epithelial tissues
Is exposed to the body
cavity or exterior
Apical surface
Adjacent to the underlying tissue
Basal surface
The epithelium consists of one cell layer
Simple epithelium.
Has more than one layer.
Stratified epithelium
Generally function in protection, absorption, and secretion
Epithelial tissues
Tissues vary widely in their form and function, but they are all characterized by
the presence of extracellular matrix.
Connective tissues
Is nonliving material composed
of protein fibers and ground substance.
Extracellular matrix
It gives strength in nervous tissue
Collagen
It gives flexibility in nervous tissue
Elastin
Bones forms in rings around haversian canals around these canals, creating osteon
Lamellae
Visible as small dark patches in the labellae
Lacunae
Red blood cells that transport oxygen
Erythrocytes
White blood cells, protects the body against foreign invaders like bacteria, viruses, etc.
Leukocytes
A third type of solid
component you may see on these slides are cellular fragments called ___.
Platelets
Specialized for contaction. A third type of solid
component you may see on these slides are cellular fragments called
Muscle tissue
- are attached to bones, and contraction of these muscles generates body
movements - voluntary
muscle fibers because we can consciously control their contractions.
Skeletal muscles
Is present in the heart, and is categorized as involuntary (not under conscious
control). Cells are striated, but the striations are much less obvious than in skeletal muscle
tissue.
Cardiac muscle
communicate with each other via electrical and chemical signals.
Neurons
is specialized for communication and composes the brain, spinal cord, and
peripheral nerves. The tissue consists of two major cell types: neurons and glial cells.
Nervous tissue
Is found in the walls of hollow organs, such as the gastrointestinal tract,
blood vessels, and the urinary bladder.
Smooth muscle tissue
which receive signals
dendrites
which sends signals
axons
are the support cells of nervous tissue.
Glial cells
