Term
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Definition
strips of fibrous tissue that outline and unite margins of bone
- jagged and immovable |
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Term
| What bone is NOT connected by sutures? |
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Definition
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Term
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Definition
| connective tissue or cartilage |
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Term
| Why are sutures important in young animals? |
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Definition
| - allows growth of the skull through extension of individual bones instead of one whole bone |
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Term
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Definition
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Term
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Definition
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Term
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Definition
| bony socket that protects the eye |
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Term
| What are the two major divisions in the skull? |
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Definition
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Term
| What are the main functions of the skull bone? |
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Definition
1. protects the brain and sense organs
2. forms passages for respiratory and digestive tracts |
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Term
| What are the external bones of the skull? |
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Definition
- occipital
- interparietal
- parietal
- temporal
- frontal |
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Term
| Why are they called external bones? |
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Definition
| - all are at least partially visible on the skull |
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Term
| What are the internal bones of the skull? |
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Definition
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Term
| Why are they called external bones? |
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Definition
| have to at least partially open or disable the skull to see them |
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Term
| Where is the occipital bone found? |
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Definition
- forms base of skull
- most caudal region |
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Term
| What does the atlantooccipital joint connect and why? |
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Definition
- connects the occipital bone and the atlas (first cervical vertebrate)
- enables animal to nod its head |
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Term
| What is the occipital condyle? |
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Definition
| - rounded prominence of bone used for articulation with another bone |
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Term
| Where are the temporal bones found? |
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Definition
| - ventral to parietal bones |
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Term
| What does the temporal bone contain? |
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Definition
| - most of the ear structures |
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Term
| What is the name of the joint that connects the temporal bone and the mandible? |
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Definition
| temperomandibular joint or TMJ |
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Term
| Describe the 2 joints that are formed with the mandible |
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Definition
1. lower joint - rotational movement (open and close)
2. upper joint - translational movement (side to side) |
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Term
| Where are the frontal bones of the skull? |
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Definition
- forehead
- rostral to parietal bones |
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Term
| What do the frontal bones form? |
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Definition
| rostrolateral portion of the cranium and portion of orbit |
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Term
| What does the sphenoid bone do? |
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Definition
- supports the brain
- houses pituitary |
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Term
| What is the function of the ethmoid bone? |
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Definition
| - site where branches of olfactory nerve pass through |
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Term
| What does the premaxillary bone house? |
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Definition
- the upper incisors
** except in ruminants who have NO upper incisors |
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Term
| What do the maxillary bones house? |
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Definition
| - canines and cheek teeth |
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Term
| When the maxillary bones are joined to palatine bones, what is formed? |
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Definition
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Term
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Definition
- bony separation between the mouth and nasal cavity
*roof of the mouth |
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Term
| What is the lacrimal bone? |
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Definition
| - forms medial portion of the orbit |
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Term
| What arises from the zygomatic arch? |
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Definition
| - masseter muscles needed for grinding forages |
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Term
| What two bones are joined to form the zygomatic arch? |
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Definition
| - zygomatic and temporal bones |
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Term
| What is another word for mandible bone? |
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Definition
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Term
| What does the mandible bone house? |
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Definition
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Term
| What is special about the mandible bone? |
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Definition
| - it is the only moving skull bone |
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Term
| What are the two regions of the mandible and what are their functions? |
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Definition
1. shaft/body - horizontal portion that houses teeth
2. ramus - vertical portion where jaw muscles are attached |
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Term
| What is the coronoid process? |
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Definition
| - where major muscles are attached |
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Term
| What are the functions of the turbinate bones? |
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Definition
- warms and humidifies the air
- traps small particles
- role in sense of smell |
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Term
| What is the axial region of the skeleton? |
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Definition
- bones of head and trunk
- appendages attached to midline or axis of the body |
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Term
| What is the appendicular region of the skeleton? |
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Definition
- bones of the limbs or appendages of the trunk
- thoracic and pelvic limbs |
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