A Study of Animal Tissues Flashcards
a tissue is
a group of similar cells that are specialized to perform a particular function
what are the 4 basic types of tissues?
- epithelium
- connective tissue
- muscle
- nervous tissue
what is histology?
the study of tissues
epithelial tissue is characterized by
closely packed cells with little or no intercellular material
epithelial tissue is a type of tissue that…
covers the external surfaces or lines internal surfaces
some epithelial cells are specialized for
secretion
what are the 3 basic cell types?
- squamous
- cuboidal
- columnar
one layer of cells is called a
simple epithelium
two or more layers are classified as
stratified
tubules in the kidney are lined with
simple cuboidal epithelium
what type of epithelium is found in the intestines?
simple columnar epithelium
what type of epithelium is found in the mouth, esophagus, and epidermis of the skin?
stratified squamous epithelium
connective tissues function to
support and bind together the other tissues of the body
what is the most common type of connective tissue?
areolar tissue
what type of tissue underlines the epithelium lining of the esophagus?
areolar tissue
what do fibroblasts produce?
intercellular connective tissue fibers
cartilage is composed of
cells called chondrocytes and a firm intercellular material called the matrix
lacunae means
small cavity
chondrocytes live in spaces in the matrix called
lacunae
chondrocytes are found in
cell nests of two or four
hyaline cartilage forms the support for
the respiratory tract
bone cells are called
osteocytes
lamellae are
canals in concentric layers
a haversian system consists of
a haversian canal, lamellae and osteocytes in lacunae
canaliculi are
tiny channels that connect the lacunae with the haverisan canal
adipose tissue is…
a modified conncetive tissue that stores reserves of energy for the body in forms of lipids
fat cells are called
adipocytes
what are the three subtypes of muscle?
- visceral
- skeletal
- cardiac
visceral muscle is AKA
smooth/ involuntary
smooth muscle fibers are
spindle-shaped cells with one centrally placed nucleus
visceral muscle is specialized for
slow, sustained, involuntary contractions
visceral muscle
is non-striated
skeletal muscle AKA
striated/ voluntary
skeletal muscle is the only
voluntary type of muscle
what is the sarcolemma?
cell membrane enclosing the muscle fiber
cardiac muscle AKA
striated/involuntary
cardiac muscle is specialized to
produce strong, rhythmic contractions
intercalated discs are…
junctions in which individual cells are connected to one another
nerve tissue makes up
the brain, spinal cord, and the nerves
what are the 2 types of cells that make up nervous tissue?
- neurons
2. glial cells
what are the 4 major parts to the nerve cell are…
- dendrites
- cell body
- synaptic terminals
- axon terminals