Lab Ex 42 Human Biology - Skeletal System

Question 1

Ligaments

Answer 1

bones are held together by these slightly elastic structures, made of dense connective tissue

Question 2

Tendons

Answer 2

bones are attached to muscles by these

Question 3

Clavicle

Answer 3

collarbone

Question 4

Scapula

Answer 4

shoulder blade

Question 5

Humerus

Answer 5

upper arm; longest and largest bone of the upper limb

Question 6

Ulna

Answer 6

longer of the 2 bones in the forearm; on the side of the little finger

Question 7

Radius

Answer 7

shorter of the 2 bones in the forearm; is on the side of the thumb

Question 8

Carpal

Answer 8

8 bones in the wrist bound by strong connective tissue

Question 9

Metacarpal

Answer 9

5 bones in the hand

Question 10

Phalange

Answer 10

bones of the fingers

Question 11

Femur

Answer 11

thigh bone; above the knee

Question 12

Fibula

Answer 12

smaller, more slender of the 2 leg bones below the knee

Question 13

Tibia

Answer 13

shin bone; larger of the 2 leg bones below the knee

Question 14

Patella

Answer 14

kneecap

Question 15

Tarsals

Answer 15

7 bones of the ankle and heel

Question 16

Metatarsals

Answer 16

5 long bones of the feet

Question 17

Phalanges

Answer 17

bones of the toes; 2 in the big toe and 3 in each of the other toes

Question 18

Sternum

Answer 18

breastbone

Question 19

Ribs

Answer 19

normally 24 bones; increase in length from the 1st through the 7th, then decrease in length to the 12th

Question 20

Vertebrae

Answer 20

26 bones, including the sacrum (forms part of the hip) and the coccyx (tailbone) (sacrum and coccyx are made of fused these)

Question 21

Skull

Answer 21

28 bones, including the middle-ear bones; most are fused with immovable joints called sutures that appear as wavy lines

Question 22

Hyoid

Answer 22

single, small U-shaped bone suspended at the front of the throat above the pharynx; does not articulate/touch any other bone

Question 23

Osteoblasts

Answer 23

bones are built by cells called this, which secrete collagen fibers as sites for the deposition of hard calcium-salt crystals

Question 24

Bone remodeling

Answer 24

strong, healthy bone is continually maintained by this ongoing replacement of old bone tissue by new bone tissue

Question 25

Osteocytes

Answer 25

as osteoblasts produce collagen and other organic components, they become trapped in these secretions; soon, they mature and are called this

Question 26

Osteoclasts

Answer 26

bone is broken down by large cells called this, in a process called bone resorption

Question 27

Bone resorption

Answer 27

process of breaking down bone