Reveiw Flashcards
What are the 5 functions of the bones
-Give shape and support the body
-Protect various internal structures and organs
-Serve as attachments for muscles and act as levers to produce body movement
-Help produce both white and red blood cells(one of the functions of bone marrow)
-Store most of the body’s calcium supply as well as phosphorus, magnesium, and sodium
How many bones does the adult skeleton have?
The adult skeleton has 206 bones.
Explanation of the Origin and Insertion
The Origin is the more fixed part of the muscle closest to the skeleton, which flexes but remains stationary( does not move)
The Insertion is the part of the muscle that is the moveable attachment(does move)
Striated
Skeletal, or voluntary muscles contract with conscious thought, attached to the bone.
Non striated
Smooth, or involuntary muscles that are not under conscious control.
Cardiac muscles
Involuntary muscles that make up the heart.
What are the 2 muscles of masification?
•Masseter
•Temporalis
Errector spine
These muscles are responsible for maintaining upright posture and extending the spine.
Gastrocnemius
Forms the bulk of the calf at the back of the lower leg.
Cervical bone
The length of the neck and the top of the back.
Tibia and fibula bone
Are the lower part of the leg and make up the shin.
Ethmoid bone
Is the light, spongy bone between the eyes sockets that forms part of the nasal cavities.
Sphenoid bone
Forms the sides of the eye socket. joins the bones of the cranium together.
Nasal bones (2)
Forms the bridge of the nose.
Lacrimal bones(2)
The smallest and most fragile bones of the face, are situated at the front inside part of the eye socket.