Bones Flashcards
The skeletal system is composed of what?
Bones, joints, cartilage and ligaments
What purpose does the skeletal system serve?
Structure, support, movement, RBC production, protection, mineral storage
What is the hollow of the bones called?
Medullary cavity
What is the outside of the bone called?
Periosteum
Give an example of a flat bone?
Brain cavity bones, ribs or sternum
True or false: the body can turn yellow bone marrow back into red bone marrow?
True
Give an example of a long bone
Most bones in the body. Tibia, fibia,, ect…
Give an example of an irregular bone
Vertebrae
Give an example of a short bone
Carpal
Mature bone cells are called what?
Osteocytes
Osteons make up what type of shape?
Tree rings
What is the shaft of a long bone called?
Diaphysis
What are the ends of a long bone called?
Epiphysis
What are growth plates called?
Epiphyseal discs/plates
What is the periosteum?
The fibrous sheath of a bone where ligaments connect to
What are 3 hormones that impact growth?
Estrogen, testosterone and growth hormone
Give an example of intramembranous ossification
Hardening of the flat bones in the skull
What is an example of endochondral ossification?
The replacement of connective tissue with bone in all parts of the body other than the flat bones of the skull
Osteoblasts lay down what?
Bones and calcium
Osteoclasts do what?
Take down & reabsorb damaged bones
What is the biggest seasemoid bone?
Kneecap/popliteal
An incomplete fracture is also called what?
A greenstick fracture
What is the only bone not attached to another bone?
Hyloid
What is included in the axial skeleton?
Head, spine, ribs, sacrum & coccyx
How many vertebrae are in section C?
7
Which vertebrae keep the diaphragm alive?
C3,4,5
How many vertebrae are in the T section?
12
How many vertebrae are in the L section?
5
How many vertebrae are in the S section?
5
How many vertebrae are in the coccyx?
2-4 fused vertebrae
Main bones of the skull?
Mandible, maxillary, frontal, nasal, temporal, sphenoid, occipital and zygomatic
Where is the foramen magnum?
The hole in the bottom of the head
The palette is formed by what bones?
Maxilla and palette
What are the 4 sinuses?
Frontal, ethmoidal, phenoidal and maxillary
What are fontanels?
Baby soft spots / skull bones that are not yet ossified
What are the 4 curves of a normal spine?
L,K,L,K (Lordosis & Kyphosis)
What type of motion does the atlas enable?
Nodding/yes
What type of motion does the axis enable?
Rotation/no
Which section of the spine has the lowest rotational ability?
The thoracic spine, it is connected to the ribs which limit rotation
What is the vertebral foramen?
The hole in vertebrae
How many sets ribs do we have? How many are true ribs? False? Floating?
Total ribs: 12
True: 7
False: 3
Floating: 2
What is the definition of a false rib?
A rib that is connected to the sternum using the cartilage of another rib
What are the 5 components of the sternum?
Xiphoid process, suprasternal notch, sternomanubrial joint, costal angle (diaphragm), costal margin
What does condyle mean?
Large knob/protusion
What does head mean?
Enlarged, rounded end - generally articulates to a synovial joint
What does facet mean?
Small flattened surface
What does crest mean?
Ridge i.e. iliac crest (of the hips)
What does spine mean?
Sharp projection (spinus process/pokey on the neck)
What does tuberosity mean?
Knoblike projection (knee where Osgood Schlattners presents)
What does trochanter mean?
Large tuberosity, only found on the femur (bump on top of femur… inner)
What does foramen mean?
Opening - usually a passage for nerves, blood vessels or ligaments
What does fossa mean?
Groove (iliac fossa is an example)
What does meatus mean?
Tunnel or tubelike passageway (urethra, where brainstem does)
What does sinus mean?
Cavity or hollow space
Where is the hook of hamate?
Base of the hand, touching the ring and pinky metacarpals
Why is the hook of hamate important?
Key landmarking - can be felt easily
What lubricates food in the digestive tract?
Mucous
True or false, bones are dead
False
What is the process of making red blood cells called?
Hemapotosis
Where are red blood cells made?
In the red bone marrow in the medullary cavities
What are the structures of spongey bone called?
Traebeculi
What is found in the central canals of bones?
Blood vessels and nerves
What are lacunae?
Little gaps between osteon rings
What are found in lacunae?
Osteocytes
Osteoblasts are what?
Bone makers
Osteoclasts are what?
Bone breakers
What two types of osteo cells work together to regenerate bone?
Osteoblasts & osteoclasts
What is apoptosis?
When osteoclasts kill themselves