Facial Bones Anatomy Quiz: Learn Human Skull Bones

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Questions and Answers

What is the function of the cribriform plates of the ethmoid bone?

To amplify sounds in the nasal cavity

To carry the upper teeth in the alveolar margin

To form the lateral walls of the nasal cavity

To allow nerve fibers for olfaction to reach the brain (correct)

Which bone forms the posterior part of the hard palate?

Zygomatic bone

Maxillae

Palatine bone (correct)

Sphenoid bone

What is the function of the foramen ovale in relation to a cranial nerve?

Regulates pituitary gland function

Allows CN V (Trigeminal nerve) to pass to the lower jaw (correct)

Carries impulses for olfaction

Transmits visual information to the brain

Which bone is commonly referred to as 'cheekbones'?

Zygomatic bone Signup and view all the answers

What structure does the sella turcica enclose?

Pituitary gland Signup and view all the answers

What is the function of the paranasal sinuses surrounding the nasal cavity?

To amplify sounds made while speaking Signup and view all the answers

What stimulates osteoclasts to increase bone resorption and release calcium?

Parathyroid hormone (PTH) Signup and view all the answers

What is the term for a fracture where the bone breaks incompletely, much like when a green twig breaks?

Greenstick fracture Signup and view all the answers

Which gland secretes Parathyroid hormone (PTH) in response to low calcium levels?

Parathyroid gland Signup and view all the answers

In which stage of life do older individuals, especially postmenopausal women, experience a decrease in bone mass?

Old age Signup and view all the answers

Which part of the body forms the longitudinal part and consists of the skull, vertebral column, and bony thorax?

Axial skeleton Signup and view all the answers

What is the hormone produced by the kidneys in response to PTH to increase calcium absorption in the intestines?

Calcitriol Signup and view all the answers

Which bone forms the bony nasal septum?

Vomer bone Signup and view all the answers

Which bone is the largest and strongest bone of the face?

Mandible Signup and view all the answers

What is the function of paranasal sinuses?

Lighten the skull Signup and view all the answers

What makes the hyoid bone unique?

It does not articulate with another bone Signup and view all the answers

Which bone forms the bridge of the nose?

Nasal bone Signup and view all the answers

What do the inferior nasal conchae bones project from?

Lateral walls of the nasal cavity Signup and view all the answers

What is the purpose of fontanelles in the fetal skull?

To allow the brain to grow Signup and view all the answers

How many cervical vertebrae are there in the vertebral column?

Seven Signup and view all the answers

Which part of the vertebral column supports the rib?

Thoracic vertebrae Signup and view all the answers

What is the largest type of vertebrae that supports the body's weight?

Lumbar vertebrae Signup and view all the answers

How many bones are present in the sacrum and coccyx combined?

Eleven Signup and view all the answers

What is the function of intervertebral discs in the vertebral column?

Protect the spinal cord Signup and view all the answers

What is the main function of the thoracic cage?

Protect the heart, lungs, and major blood vessels Signup and view all the answers

Which part of the sternum is located in the center of the anterior thoracic wall?

Body Signup and view all the answers

How many pairs of true ribs are there in the bony thorax?

7 pairs Signup and view all the answers

At what age do the three parts of the sternum usually fuse together?

25 years Signup and view all the answers

What is the name for an increased lateral curvature of the spinal column?

Scoliosis Signup and view all the answers

In which condition may the nucleus pulposus leak out due to a tear in the annulus fibrosus?

Herniated disc Signup and view all the answers

Study Notes

Stages in the Healing of a Bone Fracture

Bone fracture healing involves several stages, including fracture, repair, and remodeling
Types of fractures include open (compound), comminuted, greenstick, impacted, Pott, and Colles

Bone's Role in Calcium Homeostasis

Bones store 99% of the body's calcium
Parathyroid hormone (PTH) is secreted when calcium levels drop, stimulating osteoclasts to release calcium into the bloodstream
PTH also stimulates the production of calcitriol, increasing calcium absorption in the intestines

Ageing and Bone Tissue

From birth to adolescence, bone production exceeds resorption
In adults, bone production and resorption are balanced
In older individuals, especially postmenopausal women, bone resorption exceeds production, leading to decreased bone mass

The Axial Skeleton

The axial skeleton consists of 80 bones that form the longitudinal part of the body
It is divided into three parts: skull, vertebral column, and bony thorax

The Skull

The skull is part of the axial skeleton
It consists of 22 bones that fuse together
The sphenoid bone is a butterfly-shaped bone that forms part of the cranial cavity
The ethmoid bone is irregularly shaped and contains the crista galli and cribriform plates
The nasal conchae are extensions of the ethmoid bone that form the lateral walls of the nasal cavity

Facial Bones

The facial bones consist of 14 bones that form the face
The maxillae bones form the upper jaw and contain the upper teeth
The palatine bone forms the posterior part of the hard palate
The zygomatic bone forms the lateral walls of the orbits
The lacrimal bone forms the medial walls of the orbits

Paranasal Sinuses

Paranasal sinuses are hollow portions of bones surrounding the nasal cavity
They lighten the skull and give resonance and amplification to the voice

The Hyoid Bone

The hyoid bone is a horseshoe-shaped bone that does not articulate with another bone
It serves as a movable base for the tongue and is situated at the top of the larynx

The Fetal Skull

The fetal skull is large compared to the infant's total body length
Fontanelles are fibrous membranes that connect the cranial bones, allowing the brain to grow
Fontanelles convert to bone within 24 months after birth

The Vertebral Column

The vertebral column is the axial support of the body
It consists of 33 bones separated by intervertebral discs that protect the spinal cord
Each vertebra is given a name according to its location

Regional Characteristics of Vertebrae

Cervical vertebrae (C1 to C7) allow for forward, backward, and twisting motions of the neck
Thoracic vertebrae support the rib
Lumbar vertebrae support the body's weight
Sacrum and coccyx are triangular-shaped bones composed of fused vertebrae

The Bony Thorax

The bony thorax forms a protective, cone-shaped cage around the heart, lungs, and major blood vessels
It is made up of the sternum, ribs, and thoracic vertebrae
The sternum is a flat bone divided into three segments: manubrium, body, and xiphoid process

Disorders

Scoliosis, kyphosis, and lordosis are curve-related pathologies that affect the spinal column
Herniated discs can occur due to trauma or aging, leading to the leakage of the nucleus pulposus into the annulus fibrosus

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Description

Test your knowledge on the anatomy of human skull bones including lacrimal bone, nasal bone, vomer bone, inferior nasal conchae, and mandible. Identify the functions and structures of these important facial bones.

Human Skull Bones Anatomy

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