Skeletal System Unit Test Flashcards
What is the frontal bone and where is it located? (1)
(CRANIAL BONE) An unpaired bone that helps form the anterior (front) and superior (up) portions of the cranium. It is located at the front of the cranium and connects with the ethmoid, sphenoid, temporal, and parietal bones.
What are the parietal bones and where are they located? (2)
(CRANIAL BONE) Bones forming the side and top of the cranium. These two bones are connected to the frontal, occipital, temporal, and sphenoid bones.
What are the temporal bones and where are they located? (2)
(CRANIAL BONE) Two major bones of the cranium, helping form the sides and base of the skull. They protect the temples in your head and surround the ear canal. They connect to the mandible, sphenoid, frontal, parietal, and occipital bones.
What is the occipital bone and where is it located? (1)
(CRANIAL BONE) The most posterior (back) cranial bone, providing protection and broad surface for muscle attachment. It is at the very back of the skull and connects to the temporal and pariatal bones.
What is the ethmoid bone and where is it located? (1)
(CRANIAL BONE) An unpaired cranial bone that is a significant part of the upper nasal cavity and nasal septum. It is in the nasal cavity and is connected to the frontal and sphenoid bones.
What is the sphenoid bone and where is it located? (1)
(CRANIAL BONE) A bone that helps form the base and lateral sides of the cranium, located near the temples. It connects with the frontal, parietal, ethmoid, occipital, and temporal bones.
What is the maxilla and where are they located? (2)
(FACIAL BONE) Left and right halves of bones that form the upper jaw, being directly above the mandible. It connects to the zygomatic and palatine bones.
What are the palatine bones and where are they located? (2)
(FACIAL BONE) Small, delicate L-shaped bones that form the rear of the hard palate and the floor of the nasal cavity. They are connected to the maxillae and sphenoid bones.
What are the zygomatic bones and where are they located? (2)
(FACIAL BONE) Also known as cheekbones, these bones are diamond-shaped and stay directly below and lateral to the eye socket. They connect to the mandible.
What are the lacrimal bones and where are they located? (2)
(FACIAL BONE) Bones the size of fingernails, located directly behind the eye socket. They secrete tears to lubricate the eyes, and are connected to the maxilla and inferior nasal concha.
What are the nasal bones and where are they located? (2)
(FACIAL BONES) Small, symmetrical, elongated bones, each having two surfaces and four borders. They are positioned in the midface, and form the bridge of the nose. They also connect to the maxilla.
What are the inferior nasal conche and where are they located? (2)
(FACIAL BONES) A pair of facial bones, helping to control airflow direction, filter, heat, and humidify air inhaled through the nose within the nasal cavity. They both extend laterally (sides), articulating with the medial walls of the maxillae and palatines.
What is the vomer and where is it located? (1)
(FACIAL BONE) A small, thin, plow shaped bone positioned in the midline of the skull (within the nasal cavity), diving the nasal cavity (into the two nostrils). It also connects with the two maxillae and palatine bones.
What is the mandible and where is it located? (1)
(FACIAL BONE) The largest bone in the human skull, also being the only one able to be moved manually. It is also known as the jaw and houses lower teeth, sitting directly under the maxilla and connecting with the temporal bones.
What are the true ribs and where are they located? (14)
(BONY THORAX) Seven pairs of ribs that connect directly with the sternum through coastal cartilages, also being the first 14 ribs.
What are the false ribs and where are they located? (8)
(BONY THORAX) Four pairs of ribs that connect with the sternum indirectly or not at all. They sit directly below the true ribs.
What are the floating ribs and where are they located? (4)
(BONY THORAX) Two pairs of ribs that do not connect with the sternum at all, appearing to be floating, hence their name. They are at the very bottom of the thoracic cage.
What are the vertebrae and where is it located? (33)
(BONY THORAX) 33 individual bones that interlock with each other to form the spine. They are separated into five regions; (cervical, thoracic, lumbar, sacrum, and coccyx). It is located in the spinal region, being the spine itself.
What is the sacrum and where is it located? (5)
(BONY THORAX) Connected to the vertebrae, the sacrum consists of 5 fused vertebral bones, being shield shaped and connecting to the pelvis.
What is the coccyx and where is it located? (4)
(BONY THORAX) More commonly referred to as the tailbone, the coccyx is positioned at the very bottom of the vertebra, made up of 3, 4 (most commonly), or 5 fused vertebrae.
What is the sternum and where is it located? (3)
(BONY THORAX) Also known as the breastbone, this sternum is a vertical bone, forming the anterior portion of the chest wall, right on the midline. It is also divided into three parts (Manubrium, Body, and Xiphoid process). It also allows the ribs to connect to it, forming the thoracic cage.
What is the the manubrium and where is it located? (1)
(BONY THORAX) The thickest and strongest portion of the sternum, located at the most superior portion of it, being shaped like a cross shield.
What is the body and where is it located? (1)
(BONY THORAX) The middle and longest portion of the sternum. It sits directly below the manubrium and right above the xiphoid process.
What is the xiphoid process and where is it located? (1)
(BONY THORAX) The most inferior portion of the sternum, taking the shape of a small triangle. It starts off as a cartilage and hardens as a person ages.
What are costal cartilages and where are they located? (10)
(BONY THORAX) Elastic bars of cartilage connecting the ribs to the sternum, along with prolonging them forward. Their elasticity also assists in respiration.
What is the cervical spine and where is it located? (7)
(VERTEBRAL COLUMN) The neck bones of the vertebra, located at the most superior point of it. (More commonly called the neck)
What is the thoracic spine and where is it located? (12)
(VERTEBRAL COLUMN) The upper bones of the vertebra, located in the upper/middle region of the spine, positioned between the cervical and lumbar spine.
What is the lumbar spine and where is it located? (5)
(VERTEBRAL COLUMN) The lower portion of the vertebra, positioned between the ribs and pelvis, whilst superior to the sacrum and coccyx.
What is the hyoid bone and where is it located? (1)
(NO SECTION) A small, U or horseshoe shaped bone, positioned in the midline of the neck and anteriorly at the base of the mandible. It also helps with speech and swallowing. It is the only bone not directly articulated with any other bone
What is the coronal suture?
(CRANIAL SUTURE) A row of dense and fibrous connective tissue located between the frontal and parietal cranial bones, connecting them.
What is the sagittal suture?
(CRANIAL SUTURE) A row of dense and fibrous connective tissue located between the two parietal bones in the midline, connecting them.
What is the Lambdoid Suture?
(CRANIAL SUTURE) A row of dense and fibrous connective tissue located between the parietal and occipital bones, connecting them.
What are some characteristics of a fetal skull?
(FETAL SKULL) Two frontal bones (which eventually form together after 8 years), two parietal bones which occupy most of the skull, little to no mandible, sutures separating bones, fontanelles in parts
What is the zygomatic process?
(FACIAL PROCESS) A protrusion from the rest of the skull, being mostly due to the zygomatic bones.
What is a process in the human skull?
A protrusion/projection/outgrowth of tissue from a larger body (a bone). All processes are named after the bone or part they are owed to.
What is the Cancellous (Spongy) Bone in a long bone and where is it located?
As the name suggests, bone interior bone with a spongy appearance, surrounded with exterior compact bone. It is usually found at the ends of the bone (Epiphysis), with tiny spots all over it.
What is the Epiphysis in a long bone and where is it located?
This part simply refers to the two ends of a long bone, with the Diaphysis being between them both.
What is the Diaphysis in a long bone and where is it located?
This part simply refers to the central area part of the long bone, with the Epiphysis being the two ends at the end.
What is Articular Cartilage in a long bone and where is it located?
A thin layer of cartilage known to be slippery, smooth, and very hard. It’s the white stuff at the end of chicken bones, and makes an incline on a bone model, or can be represented as a very thin line near the spongy bone.
What is Periosteum in a long bone and where is it located?
The most exterior part of the bone, covering all parts of the bone except for articular cartilage
What is Compact Bone in a long bone and where is it located?
Located in the Diaphysis and found under the Periosteum, this bone is very dense and covers the entire Diaphysis
What is the Medullary Cavity in a long bone and where is it located?
Being the cavity of the Diaphysis, this part holds red marrow which grows to yellow as it ages, along with containing the nutrient artery. It is located between the yellow marrow and spongy bone