PRE-LAB Activity 2: Examining the Fetal Skull The anterior fontanel is located:

Question

PRE-LAB Activity 2: Examining the Fetal Skull The anterior fontanel is located: a. between the occipital and parietal bones. b. where the coronal and frontal sutures meet. c. where the lambdoid and sagittal sutures meet. d. between the sphenoid and temporal bones. 2. Of what tissue are the "soft spots" composed? a. hyaline cartilage · b. osseous tissue c. epithelium d. fibrous connective tissue PRE-LAB Activity 3: Studying the Bones of the Vertebral Column and Thoracic Cage 1. Each human has cervical vertebrae. 3. Each human has pairs of ribs 2. Which of the following bony features is found on thoracic vertebrae only a. costal facets b. transverse foraminad. lamina c. vertebral foramen PRE-LAB Activity 4: Identifying Bones-in-a-Bag 1. If you feel a long, thin, curved bone, it is most likely 2. Ifa bone fees like it has posts on ether side and teeth i a. a skull bone. b. a vertebra. c. the sternum. d. a rib. the middle, it is most likely: a. a temporal bone. b. the zygomatic bone.d. the palatine bone. c. the mandible. The Skull Cranial vault The skull protects the delicate brain, provides attachment sites for head and neck muscles, and houses the major organs for vision, hearing, balance, taste, and smell. The skull and associated bones total 29 bones: 22 skull bones (8 cranial bones and 14 facial bones), 6 auditory ossicles (discussed in Unit 18), and the hyoid bone (discussed with the skull because of its proximity). The vertebral column supports the trunk, protects the spinal cord, and provides attachment sites for the ribs and for the muscles of the neck and back. In fetuses and infants, the vertebral column consists of 33 sepa rate vertebrae. However, adults have only 26 vertebral bones because nine of these bones eventually fuse to form two com- posite bones-the sacrum and coccyx. The thoracic cage (or rib cage) forms a protective structure around the organs of the thoracic cavity. It consists of the sternum and the paired ribs (a total of 25 bones), the costal cartilages, and the tho- racic vertebrae of the vertebral column. Anterior cranial Posterior Middle The eight bones that form the cranium-the cranial Cranial cranial bones-are connected by immovable articulations called baser sutures. The cranium can be divided into two major areas: the cranial vault (or calvarium), which forms the superior, lateral, Figure 9-1 The cranial vault and the cranial base, with the and posterior walls of the skull, and the cranial base (or cra- locations of the three cranial fossae indicated. nial floor), which forms the bottom of the skull (Figure 9-1). fossa fossa

Explanation / Answer

Activity 2:

1. The anterior fontanel is located where the coronal and frontal sutures meet.

2. The "soft spots" composed of fibrous connective tissue.

Activity 3:

1. Each human has seven cervical vertibrae.

2. Costal facets are the bony features found only on thoracic vertebrae.

3. Each human has 12 pairs of ribs.

Activity 4:

1. If the bone is long, thin, curved bone, it is most likely a rib.

2. If a bone feels like it has posts on either side and teeth in middle, it is most likely the mandible.

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