Chapter 3- The Skeletal System Flashcards
Red bone marrow forms some blood cells. Yellow bone marrow stares fat. -myel/o (also means spinal cord)
Bone marrow
Act as the framework for the body, protect the internal organs, and store the mineral calcium. -oss/e, oss/i, oste/o, ost/o
Bones
Creates a smooth surface for motion within the joints and protects the ends of the bones. -chondr/o
Cartilage
Work with the muscles to make a variety of motions possible. -arthr/o
Joints
A baby’s skeleton begins as fragile membranes and cartilage, but after three months it starts turning into bone in a process called __________, which continues through adolescences.
Ossification
Break down old or damaged bone
Osteoclasts
Help rebuild the bone
Osteoblasts
Though, fibrous tissue that forms the outermost covering of the bone. Ex: banana covering that protects and covers the actual banana
Periosteum
-um
Noun ending
Also known as cortical bone, dense, hard, and very strong bone that forms the protective outer layer of bones
Compact bone
Also known as cancellous bone, lighter and not as strong as compact bone. This type of bone is commonly found in the ends and inner portions of long bones such as the femur. Red bone marrow is located within this ____________ bone.
Spongy bone
Central cavity located in the shaft of long bones where it is surrounded by compact bone. It is here that red and yellow bone marrow are stored.
Medullary cavity
Pertaining to the inner section
Medullary
Tissue that lines the medullary cavity
Endosteum
Within
end-
Located within the spongy bone, is a hemopoietic tissue that manufactures red blood cells, hemoglobin, white blood cells, and thrombocytes.
Red bone marrow
Pertaining to the formation of blood cells. Also spelled hematopoietic.
Hemopoietic
Blood
Hem/o
Pertaining to formation
-poietic
Fat storage area. It is composed of chiefly of fat cells and is located in the medullary cavity of long bones.
Yellow bone marrow
Smooth, rubbery, blue-white connective tissue that acts as a shock absorber between bones.
Cartilage
Covers the surfaces of bones where they come together to form joints. This cartilage makes smooth joint movement possible and protects the bones from rubbing against each other.
Articular cartilage
Curved fibrous cartilage found in some joints, such as the knee and the temporomandibular joint of the jaw.
Meniscus
Shaft of a long bone
Diaphysis
Ends of long bones such as the femurs of the long legs. Covered with articular cartilage to protect it.
Epiphyses
End of the bone located nearest to the midline of the body
Proximal epiphysis
End of the bone located farthest away from the midline of the body
Distal epiphysis
Opening in a bone through which blood vessels, nerves, and ligaments pass
Foramen
The spinal cord passes through the ___________ ____________ of the occipital bone at the base of the skull.
Foramen magnum
Normal projection on the surface of a bone that most commonly serves as an attachment for a muscle or tendon
Process
___________ ___________ is the bony projection located on temporal bones just behind the ears
Mastoid process
Also known as articulations, place of union between two or more bones
Joints
Consisting of inflexible layers of dense connective tissue, hold the bones tightly together
Fibrous joints
Do not allow any movement. In newborns and very young children, some fibrous joints are movable before they have solidified.
Sutures
Also known as soft spots, are normally present on the skull of a newborn
Fontanelles
Allow only slight movement and consist of bones connected entirely by cartilage. Where the ribs connect to the sternum (breast bone), these joints allow movement during breathing
Cartilaginous joints
Some movement to facilitate childbirth
Pubic symphysis
Created where two bone articulate to permit a variety of motions
Synovial joints
Come together
Articulate
Such as the hips and shoulders, allow a wide range of movement in many directions
Ball-and-socket joints
Knees and elbows, are synovial joints that allow movement primarily in one direction or plane
Hinge joints
Lines the capsule and secretes synovial fluid
Synovial membrane
Flows writhing the synovial cavity, acts as a lubricant to make the smooth movement of the joint possible
Synovial fluid
Bands of fibrous tissue that form joints by connecting one bone to another bone or by joining a bone to cartilage. Complex hinge joints, such as the knee, are made up of series of ___________ that permit movement in different directions.
Ligaments
A fibrous sac that acts as a cushion to ease movement in areas that are subject to friction, such as in the shoulder, elbow, and knee joints where a tendon passes over a bone
Bursa
Protects the major organs of the nervous, respiratory, and circular systems. Consist of 80 bones of the head and body that are organized into five parts. 1) the bones of the skull 2) the ossicles, bones of the middle ear 3) the hyoid bone, located on the throat between the chin and the thyroid 4) the rib cage 5) the vertebral column
Axial skeleton
Makes body movement possible and also protects the organs of digestion, excretion, and reproduction. Consist of 126 bones that are organized into: 1) the upper extremities-shoulders, arms, forearms, wrists, and hands 2) the lower extremities-hips, thighs, legs, ankles, and feet
Appendicular skeleton
8 bones that form the cranium, 14 bones that form the fade, and 6 bones in the middle ear
Skull
Skull
Crani
Anterior portion of the cranium that forms the forehead
Frontal bone
Two of the largest bones of the skull
Parietal bones
Forms the back part of the skull and the base of the cranium
Occipital bone
Form the sides and the base of the cranium
Temporal bones
External opening of a canal. (Ear)
Meatus
Light, spongy bone located at the roof and sides of the nose
Ethmoid bone
Bony socket that surrounds and protects each eyeball
Orbit
The ______ is made up of 14 bones
Face
Form the upper part of the bridge of the nose
Nasal bones
Also known as the cheek bones, articulate with the frontal bone that makes up the forehead
Zygomatic bones
Also known as the maxillae, form most of the of the upper jaw.
Maxillary bones
Thin, scroll-like bones that form part of the interior of the nose
Inferior conchae
Forms the base for the nasal septum
Vomer bone
The cartilage wall that divides the two nasal cavities
Nasal septum
Also known as the jaw bone, is the only movable bone of the skull
Mandible
Also known as the rib cage, is the bony structure that protects the heart and lungs
Thoracic cavity
The 12 pairs of ______, which are also known as costals, attach posteriorly to the thoracic vertebrae
Ribs
Rib
Cost
Pertaining to
-al
First seven pairs of ribs are called _________, and they attach anteriorly to the sternum
True ribs
The next three pairs of ribs are called _____________, and they attach anteriorly to cartilage that connects them to the sternum
False ribs
The last two pairs of ribs are called ______________, because they are only attached posteriorly to the vertebrae but are not attached anteriorly
Floating ribs
Also known as the breast bone, is a flat, dagger- shaped bone located in the middle of the chest. By joining with the ribs, it forms the front of the rib cage.
Sternum
The bony structure that forms the upper portion of the sternum
Manubrium
The bony structure that forms the middle portion of the sternum
Body of the sternum
Structure made of cartilage that forms the lower portion of the sternum
Xiphoid process
Also known as the shoulder girdle, supports the arms and hands
Pectoral girdle
A structure that encircles the body
Girdle
Also known as the collar bone, slender bone that connects the manubrium of the sternum to the scapula
Clavicle
Also known as the shoulder blade
Scapula
Extension of the scapula that forms the high point of the shoulder
Acromion
Bone of the upper arm
Humerus
Smaller and shorter bone in the forearm. Runs up the thumb side of the forearm.
Radius
Larger and longer bone of the forearm. The proximal end articulates with the distal end of the humerus to form the elbow joint
Ulna
Also known as the funny bone, a large projection on the upper end of the ulna. This forms the point of the elbow and exposes a nerve that tingles when struck.
Olecranon process
Bones that form the wrist. (Wrist bones)
Carpals
Are the five bones that form the palms of the hand
Metacarpals
Are the fourteen bones of the fingers. (Digits) the bones of the toes are also known as this.
Phalanges
Each of the four fingers has three bones
Distal (outermost), middle, and proximal (nearest the hand) phalanges
The thumb has two bones
Distal and proximal phalanges
Also known as the vertebral column, protects the spinal cord and supports the head and body
Spinal column
Pertaining to the vertebrae
Vertebral
Anterior portion of the vertebrae is solid to provide strength
Body of the vertebrae
Posterior portion of a vertebra. The transverse and spinous processes extend from this area and serve as attachments for muscles and tendons.
Lamina
Made of cartilage, separate and cushion the vertebrae from each other. They also act as shock absorbers and allow movement of the spinal column.
Intervertebral disks
These are the first set of 7 vertebrae, and they form the neck.
Cervical vertebrae
Pertaining to the neck, and these vertebrae are also known as C1 through C7.
Cervical
T1 through T12, are the second set of 12 vertebrae. Each of these vertebrae has a pair of ribs attached to it, and together they form the outward curve of the spine.
Thoracic vertebrae
Pertaining to the thoracic cavity
Thoracic
Known as L1 through L5, make up the third set of 5 vertebrae, and together they form the inward curve of the lower spine. These are the largest and strongest of the vertebrae and bear most of the body’s weight.
Lumbar vertebrae
Relating to the part of the back and sides between the ribs and the pelvis
Lumbar
Slightly curved, triangular-shaped bone near the base of the spine that forms the lower portion of the back. At birth, this is composed of five separate bones; however in the young child, they fuse together to form a single bone.
Sacrum
Also known as the tailbone, forms the end of the spine and is actually made up four small vertebrae that are fused together
Coccyx
Protects internal organs and supports the lower extremities.
Pelvic girdle
Forms the lower posterior portion of the pubic bone, bears the weight of the body when sitting
Ischium
Also known as the hip socket, is the large circular cavity in each side of the pelvis that articulates with the head of the femur to form the hip joint
Acetabulum
The largest bones in the body. Also known as the thigh bones.
Femurs
Articulates with the acetabulum (hip socket)
Head of the femur
Narrow area just below the head of the femur
Femoral neck
Also known as the kneecaps, is the bony anterior portion of the knee
Patella
Describes the posterior space behind the knee where the ligaments, vessels, and muscles related to this joint are located.
Popliteal
Make possible the movements of the knee. These are also known as the anterior and posterior __________ ligaments because they are shaped like a cross.
Cruciate ligaments