Q33, 34
Q.33. How do calcium level regulate our body mechanism ? focus on joint problems.
Q.34. Analyze the bone present in skull, rib-cage, fore limb, hind limbs.

Dear student

Please refer the solution below for the said query

34.
The bones present in skull, rib cage, fore limbs and hind limbs are:
 

Skull − 22 bones

• Has two sets of bones − Cranial (8) and Facial (14)

• Skull also includes a U-shaped bone called hyoid, present at the base of the buccal cavity

• Ear Bones (ear ossicles) − Malleus, Incus, Stapes

• Skull articulates with the vertebral column via two occipital condyles.
  
  
   

• Ribs − 12 pairs

  • Connects dorsally to the vertebral column
    Connects ventrally to the sternum

  • True Ribs: First 7 pairs; they connect both dorsally and ventrally to the vertebrae and the sternum respectively via the hyaline cartilage

  • False (vertebrochondral) Ribs: 8^th, 9^th and 10^th pairs; do not connect to the sternum directly, but connect indirectly through the seventh rib

  • Floating Ribs: 11^th and 12^th pairs; do not connect ventrally

• Rib cage = Thoracic vertebra + Ribs + Sternum
  
  Limbs (each limb has 30 bones)
  
  
  
  
  
  

   

• Knee cap − Patella
•  

Hope this information clears your doubt about the topic.

Regards