regions of the vertebral column. Describe the structure of the thoracic cage. Ac
ID: 3506280 • Letter: R
Question
regions of the vertebral column. Describe the structure of the thoracic cage. Activity 7.14 PRE-LAB QUIZ Before you begin, read all the activities in Exercise 7 and the required reading in your textbook that is assigned by your instructor. 1. During this laboratory exercise, you will classify bones according to oxial and 2. Consider the following supply list: a skeleton, a heart model, a skull, individual vertebrae, a brain model, and a model of bone tissue. To complete all the activities in this laboratory exercise, which item on the list will not be used? ihart mode 3. True or False: Osteons are the basic functional units of spongy bone. False 4. True or False: The carpal bones are classified as short bones.cue 5. What type of bone has a shaft (diaphysis) and two expanded knoblike ends (epiphyses? 6. The skull is composed of two distinct groups of bones: the cranial bones and the cial bones. 7. Th e thoracicvertebrae articulate (form joints) with the ribs. 8.) In the fetal skull the developing cranial bones are connected by areas of fibrous connective tissue called Fontanclia True or False: In a typical vertebra, the pedicles and laminae form the spinous process. 9. True or False: The costal cartilages of vertebrosternal ribs are directly attached to the sternum. True 10.Explanation / Answer
Answers for 6 and 8:
6. Facial bones
Skull is composed of two groups of bones namely Cranial bones and facial bones. Skull has 22 bones in which 8 are cranial bones while 14 are facial bones.
8. Fontanelle.
Skull bones are incompletely formed at birth. Hence, they are joined with the help of fibrous connective tissues called as fontanelles. They are entirely replaced with bone within two years after the birth.
Other answers and their explanation:
1. Bones can grouped under Appendicular skeleton oor Facial Skeleton
Appendicular Skeleton: Consists of bones of limb, shoulder and pelvic girdles
Axial Skeleton: Consists of bones of head, neck and trunk.
2. In the given list:
Hence, the answer is HEART MODEL.
3. Osteon or Harvesian system is the functional unit of compact bone but not the spongy bone. Hence, the given statement is false.
Osteon consists of concentric layers of osteocytes around the central canal. The canal has blood vessels which carries blood in and out of the osteon.
4. Carpal bones are short appendicular bones. Hence, the give statement is TRUE.
5. Long bones have more length than the breadth (width) unlike short bones which are usually near cube shaped.
Long bones have shaft called Diaphysis whose both expanded ends are called epiphyses. Diaphysis meets the epiphyses near the metaphyses.
7. Thoracic vertebrae articulate with the ribs. They are 12 in number. Together with sternum and ribs they form the thoracic cage which provides safe enclosure to heart and lungs.
9. Pedicle along with two laminae on either side create the spinous process. Hence, the given statement is True.
10. Costal cartilages of vertebrosternal ribs are attached to the sternum. Costal cartilage comprises of Hyaline cartilage which is elastic and allow expansion of ribcage during respiration.
Hence, the given statement is true.
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