Connective Muscle Flashcards
What are the three types of muscle
Skeletal, cardiac, and smooth
Where is skeletal located
Cardiac? Smooth?
Skeletal:attached to bones or occasionally skin
Cardiac: walls of the heart
Smooth: walls of hollow organs
What is smooth muscle
Spindle shaped cells with central nuclei, no striations, arranged to form close sheets
What is the function of smooth muscle
Involuntary control, propels objects along internal passageways
Function of sketeltal
Voluntary movement, locomotion, voluntary control
What is skeletal muscle
Long, cylindrical, multinucleate cells, with striations
What is cardiac muscle
Branching, striated, unicleate cells
Function of cardiac muscle
As it contracts, it propels blood into circulation.
Connective tissue
Consist of living cells surrounded by matrix
Arise from a common embryonic tissue called mesenchyme.
4 types of connective tissues
Cartilage
Bone
Blood
Proper
Two types of proper tissue
Loose and dense
Three types of loose tissue
Areolar, adipose, reticular
Adipose
Fat cells, provides reserve food fuel, insulates against heat loss, under skin in hypodermis.
Reticular
Network of reticular fibers in loose ground substance; form a soft internal Skelton that supports other cell types, in lymphoid organs
Areolar
Gell like matrix, with all three fiber types, wraps and cushions organs, plays role in inflammation, conveys and holds tissue fluids, under epithelia.
Types of dense tissue
Dense irregular
Elastic
Dense regular
Dense regular
Parallel collagen fibers, few elastic fibers, fibroblasts.
Attaches muscles to bones; withstands great tensile stress when pulling.
In tendons, most ligaments
Elastic
Dense reg connective tissue with elastic fibers
Allows recoil of tissue following stretching, aids passage recoil of lungs.
In walls of big arteries and certain ligaments associated with vertebral columns
Dense irregular
Irregularly arranged collagen fibers; some elastic, fibroblasts
Withstands tension and gives strength
In capsules of organs of joints, dermis of the skin, digestive tract in submucosa
Cartilage
Lacks nerve fibers
Flexible
Avascular
Stands up to tension and compression
Three types of cartilage
Hyaline, elastic, and fibrocartilage
Hyaline
Most abundant
Provides supprort
Covers up ends of long bones as articular cartilage
Amphous but firm matrix
Elastic
More elastic fibers in matrix
Great flexibility
In ear
In ear and epiglottis
Fibrocartilage
Less firm than hyaline and think collagen fibers
Absorbs compressive shock
In discs of knee joints, intervertebral discs, and pubic symphysis
