AP PSYCHOLOGY

BIOLOGICAL BASES OF BEHAVIOR

THE NERVOUS AND ENDOCRINE SYSTEMS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Adult have 260 bones
A
TRUE
B
FALSE
C
Either A or B
D
None of the above
Explanation: 

Detailed explanation-1: -An adult human has a total 80 bones in the axial skeletal system and 126 bones in the appendicular skeletal system which makes a total of 206 bones in the entire human skeletal system. The axial skeleton system included skull(22 bones), rib cage(25 bones), vertebrae(26 bones), ear ossicles(6 bones) and hyoid bone(1).

Detailed explanation-2: -The adult human skeleton is made up of 206 bones. These include the bones of the skull, spine (vertebrae), ribs, arms and legs. Bones are made of connective tissue reinforced with calcium and specialised bone cells.

Detailed explanation-3: -A baby’s body has about 300 bones at birth. These eventually fuse (grow together) to form the 206 bones that adults have.

Detailed explanation-4: -The baby skeleton has more bones and cartilages. During development many of these cartilages become bones by the process called ossification and some bones fuse to form a bigger bone reducing the number of bones to 206.

Detailed explanation-5: -An adult human skeleton consists of 206 bones in total. At the time of birth, there are 270 bones which fuse with time to come to a total of 206 bones. The total bones of our body can be divided into axial skeleton (80) and appendicular skeleton (126).

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