SKELETAL Flashcards
▪ Parts of the skeletal system
▪ Bones (skeleton)
▪ Joints
▪ Cartilages
▪ Ligament
Two subdivisions of the skeleton
- Axial skeleton
- Appendicular skeleton
Stores ______ and ___; as well as
minerals and fats;
Calcium and phosphorus;
Fat in the internal marrow cavity
Blood cell formation
(hematopoiesis)
adult skeleton has ___ bones
206
sesamoid (patella) bones are ____ type of bones.
short bones
Shaft
▪ Makes up most of bone’s length
▪ Composed of compact bone
▪ Diaphysis
Outside covering of the diaphysis
▪ Fibrous connective tissue membrane
▪ Periosteum
Ends of the bone
▪ Composed mostly of spongy bone enclosed by thin
layer of compact bone
Epiphysis
Covers the external surface of the epiphyses;
Decreases friction at joint surfaces
▪ Articular cartilage
Made of hyaline cartilage
Articular cartilage
Marrow cavity, aka…?
medullary cavity
Contains yellow marrow (mostly fat) in adults
▪ Contains red marrow for blood cell formation in
infants
medullary cavity
▪ Cavity inside the shaft
medullary cavity
In adults, red marrow is situated in cavities of _____ ____ and _______ of some long bones
spongy bone and epiphyses
Osteocytes are situated within cavities known as
_______
lacunae
Lacunae are arranged in concentric rings called ______
lamellae
Lamellae are rings, around the central canal or
___________ _____
haversian canal
Carries blood vessels and nerves
▪ Central (Haversian) canal
▪ Form a transport system connecting all bone cells
to a nutrient supply
▪ Canaliculi
__________ ____ deposited in the matrix make bone
hard
calcium deposits
__________ _____ of the matrix make bone flexible
organic parts
major phases of ossification in long bones
Osteoblasts;
Enclosed cartilage is digested away, opening up a medullary cavity
PTH means? (p.46)
Parathyroid Hormone
