Lab 10

Question 1

What is an osteon?

Answer 1

the basic structural unit of compact bone

Question 2

What is a lamella?

Answer 2

layer of matrix in compact bone, lacunae and osteocytes found in between

Question 3

What is a lacuna

Answer 3

small cavity which holds an osteocyte

Question 4

What is canaliculi?

Answer 4

tiny canals that connect lacunae to each other, allow nutrients to reach osteocytes

Question 5

What is the central canal?

Answer 5

extends through center of osteon, holds artery, vein, and nerve

Question 6

Perforating canal

Answer 6

connects central canals of adjacent osteons, runs perpendicular to central canal

Question 7

What is spongy bone?

Answer 7

also called cancellous bone, lattice-like appearance, holds red bone marrow

Question 8

osteoclast

Answer 8

giant bone cell, 50 or more nuclei

Question 9

osteoblast

Answer 9

convert to osteocytes when surrounded by matrix

Question 10

trabeculae

Answer 10

plates of bone, has lamellae with embedded osteocytes, no osteons

Question 11

what is articular cartilage made of?

Answer 11

hyaline cartilage

Question 12

What is a bone that develops as a small island within sutures/joints between cranial bones?

Answer 12

sutural or Wormian bones

Question 13

bones formed in tendons due to stress

Answer 13

sesamoid bones

Question 14

what is the axial skeleton?

Answer 14

along vertical midline, supports head, neck, vertebra, and thorax

Question 15

appendicular skeleton

Answer 15

upper and lower limbs

Question 16

smooth surfaces of bone

Answer 16

condyles and heads

Question 17

rough areas of bone

Answer 17

trochanters and tuberosities