Chapter 42-Tissues Flashcards
groups of cells that are similar in structure and function
tissues
3 germ layers
endoderm, mesoderm, ectoderm
embryonic tissues
germ layers
4 primary tissues
epithelial, connective, muscle, nerve
combinations of different tissues that form a structural and functional unit
organs
groups of organs that cooperate to perform the major activities of the body
organ systems
The vertebrate body contains ___ principle organ systems.
11
inner tube
digestive tract
outer tube
main vertebrate body supported by skeleton
outermost layer
skin and accessories
inside of the body there are ___ identifiable cavities
2
dorsal body cavity
within the skull and vertebrae
ventral cavity
extends anteriorly from the area bounded by the rib cage and vertebral column posteriorly to the area contained within the ventral body muscles and the pelvic girdle
thoracic cavity
contains the heart and lungs
abdominopelvic cavity
contains many organs including stomach, intestines, liver, kidneys, and urinary bladder
pericardial cavity
thin space within mesodermal layers around the heart
pleural cavities
two thin spaces around the lungs
peritoneal cavity
coelomic space
epithelial tissue
covers every surface of the vertebrate body; tightly bound together to provide protective barrier; posses regenerative powers replacing cells throughout life; can come from any of the three germ layers
Membrane that connects epithelial tissues to connective tissues
fibrous membrane
basal surface
secured side of the epithelium
apical surface
free side of the epithelium
Epithelia have inherent _________ which is important for their function.
polarity
2 general classes of Epithelial Tissue
simple and stratified
Simple Epithelial Tissue
one layer thick
Stratified Epithelial Tissues
several layers thick
Simple squamous lines…
lungs and blood capillaries
Simple cuboidal lines…
kidney tubules and several glands
Simple columnar lines…
airways of the respiratory and digestive tract ; contains goblet cell which secrete mucus
Stratified squamous makes up
epidermis
Keratinized epithelium contains
water resistant keratin
Exocrine glands are connected by a duct to the epithelium. What are the three glands?
sweat, sebaceous, and salivary
Endocrine glands
- ductless
- secrete hormones into the blood
- inside the body
connective tissues derived from…
embryonic mesoderm
two major classes of connective tissue
connective tissue proper and special connective tissue
connective tissue proper
loose or dense tissue
special connective tissue
cartilage, bone, blood
all connective tissues has a _______
matrix
matrix is made up of
protein fibers and ground substances
loose connective tissue
cells scattered w/in a matrix that contains large amounts of ground substance; strengthened by protein fibers scattered throughout such as collagen and elastin
collagen
support tissue
elastin
makes the tissue elastic
adipose cells
fat cells; type of connective tissue proper
dense connective tissue
contains less ground substance and more collagen; divided into regular and irregular
tendons
muscle to bone
ligaments
bone to bone
dense regular connective tissue
makes up tendons and ligaments
dense irregular connective tissue
covers kidney, muscle, nerves, and bone