Skeletal/muscular systems Flashcards
(69 cards)
The study of bones is called
Osteology
Provides strong support for the body
Skeletal system
How many bones are in the body?
206
Functions of the skeletal system
Support Protection (of vital organs) Movement (levers in muscle action) Storage (of minerals, primarily calcium and phosphorous) Blood cell formation
How much is the content of inorganic (mineral) matter (water, mineral salts, calcium phosphate - main component)
2/3 or 67%
How much organic (animal) matter Protein fibers collagen -mineral salts are deposited here -creates flexibility -tensile strength -amount decreases with age
1/3 or 33%
What are the two types of bones?
Cancellous
Compact
Also know as spongy
Reduces the overall weight of the skeleton
Found in the ends of long bones and sandwiched between layers of compact bone in flat bones such as the skull
Cancellous
Also know as dense
Arranged in concentric rings
Cells communicate nutrients and wastes through thread-like cytoplasmic extensions know as canaliculi.
Compact bone
Factors that effect bone growth and development.
Exercise
Sunlight
Nutrition
Hormones
The 80 bones from the upright axis of the body, plus the ear bones
Axial skeleton
The skull contains how many bones
22 bones plus 6 ear ossicles = 28 total
What bones are located in the cranium?
(8) 2 parietal 2 temporal 1 frontal 1 occipital 1 sphenoid 1 ethmoid
How many bones are in the face
(14) 2 nasal 2 maxillary 2 zygomatic or malar 2 lacrimal 2 palatine 2 inferior conchae or turbinate 1 vomer 1 mandible
No attachment to other bones ( Adam’s apple)
Hyoid
How many bones are in the vertebral column?
(26) 7 cervical vertebrae 12 thoracic vertebrae 5 lumbar vertebrae 1 sacrum- 5 fused 1 coccyx - 4 fused
How many bones make up the sternum and ribs?
(25) 1 sternum 7 pairs of true ribs 5 pairs of false ribs (2 pairs are floating ribs)
The study of muscles function and pathology is termed?
Myology
The muscular system accounts for approximately how much of the total body weight?
40%
A sheet of pearly-white fibrous tissue that takes the place of a tendon in sheet like muscles having a wide area of attachment.
Aponeuroses
Types of muscles
Cardiac
Smooth
Skeletal
The voluntary striated muscles that are innervated by large motor neurons. They also are attached to a bone or bones by tendons or aponeuroses
Skeletal muscles
The portion that serves as the anchor or non-moveable portion of the muscle.
The ORIGIN of a muscle
The manner or place of attachment of a muscle to the part the moves.
Insertion