A&P LECTURE EXAM 2 -
SKELETAL SYSTEM WITH
VERIFIED ANSWERS GRADED
A+ (2026)
skeletal system - answer-bones
cartilage
ligaments
joints
skeletal system functions - answer-- structural support for body
- storage (Ca2+ and P)
- blood cell production (red bone marrow located within some bones, produces red and
white blood cells)
- protection (organs and tissues)
- movement (bones act as levers for skeletal muscles to pull on)
classification of bones - answer-shape
bone shapes - answer-- long (longer than wide(humerus and femur)
- short (cube-like/carpal wrist bones)
- flat (this, flat, curved/parietal skull bone)
- irregular (complex shapes/pelvic and vertebrae)
Long Bone - answer-
Bone cell types - answer-osteocytes
osteoblasts
, osteoclasts
Osteocytes - answer-- mature bone cells
- most abundant cells
- maintain bone structure
- bone repair
osteoblasts - answer-- produce new bone (absorption of Ca2+)
- differentiate into osteocytes after they're surrounded by calcified matrix
osteoclasts - answer-- giant cells with more than 50 nuclei
- remove and recycle bone matrix (breaks down bone releasing Ca2+ (resorption)
Bone tissue types - answer-compact and spongy
compact bone (dense bone) - answer-- remember its a tissue
- made of osteons (basic functional units of compact bone)
osteon - answer-
spongy bone - answer-- tissue
- no osteons, but instead consists of a network of trabeculae + canaliculi + lacunae
bone growth - answer-- occurs from ~6 weeks after fertilization to ~25 years of age
- involves replacing of cartilage with bone tissue = ossification
osteogenesis - answer-formation of bone
SKELETAL SYSTEM WITH
VERIFIED ANSWERS GRADED
A+ (2026)
skeletal system - answer-bones
cartilage
ligaments
joints
skeletal system functions - answer-- structural support for body
- storage (Ca2+ and P)
- blood cell production (red bone marrow located within some bones, produces red and
white blood cells)
- protection (organs and tissues)
- movement (bones act as levers for skeletal muscles to pull on)
classification of bones - answer-shape
bone shapes - answer-- long (longer than wide(humerus and femur)
- short (cube-like/carpal wrist bones)
- flat (this, flat, curved/parietal skull bone)
- irregular (complex shapes/pelvic and vertebrae)
Long Bone - answer-
Bone cell types - answer-osteocytes
osteoblasts
, osteoclasts
Osteocytes - answer-- mature bone cells
- most abundant cells
- maintain bone structure
- bone repair
osteoblasts - answer-- produce new bone (absorption of Ca2+)
- differentiate into osteocytes after they're surrounded by calcified matrix
osteoclasts - answer-- giant cells with more than 50 nuclei
- remove and recycle bone matrix (breaks down bone releasing Ca2+ (resorption)
Bone tissue types - answer-compact and spongy
compact bone (dense bone) - answer-- remember its a tissue
- made of osteons (basic functional units of compact bone)
osteon - answer-
spongy bone - answer-- tissue
- no osteons, but instead consists of a network of trabeculae + canaliculi + lacunae
bone growth - answer-- occurs from ~6 weeks after fertilization to ~25 years of age
- involves replacing of cartilage with bone tissue = ossification
osteogenesis - answer-formation of bone
