Skeletal System

Frontal Bone

Forms the forehead, bony projections under the eyebrows, and superior orbit of the eye.

Parietal Bone

Parked bones that form the superior and lateral walls of the cranium. Meets at the midline of the skull at the Sagittal suture and form the coronal suture where they meet at the frontal bone.

Temporal Bone

Inferior to the parietal bones. Join at the squamous structures and contain a number of bony markings.

Occipital Bone

Most posterior bone of the cranium. The base and back wall of the skull. Joins the parietal bone at the lamboid suture.

Sphenoid Bone

Butterfly in shape and spans the width of the skull.

Ethmoid Bone

Irregularly shaped and anterior to the sphenoid bone. Forms the roof of the nasal cavity.

14 (12 are parked)

How many bones are part of the facial bone?

Maxillary Bones

Fuse to form the upper jaw and holds the upper teeth with the maxillae.

Palatine Process

Extensions of the maxillae and forms anterior hard palate of the mouth

Paranasal Sinuses

Lighten skull bones and amplify the sounds we make when we speak.

Palatine Bones

Forms the posterior part of the hard palate

Zygomatic Bones

Commonly referred to as the cheekbones and form a good portion of the eye sockets

Lacrimal Bones

Medial walls of the orbit in the eye. Each of these bone has a groove that serves as a passageway for tears.

Nasal Bones

Form the bridge of the nose

Vomer

One of the 2 facial bones that aren’t paired. A single bone in the median line of the nasal cavity

Inferior Nasal Conchae

Thin, curved bones projecting medically from the lateral walls of the nasal cavity

Mandible

One of the 2 facial bones that aren’t paired. The lower jaw that is the largest and strongest bone of the face

Hyoid Bone

Technically not part of the skull, but a moveable base for the tongue and an attachment point for neck muscles that raise and lower the larynx when we swallow and speak. Only bone of the body that doesn’t articulate directly with any other bone. Suspended in the mid-neck region and anchored by ligaments to the styloid process.

Fetal Skull

When a baby or born its skeleton is unfinished.

Fontanels

Regions of unfinished bone from a fetal skull that allows for the fetal skull to be compressed during birth. Also allows for the infant brain to continue to grow during alter parts of pregnancy and early infancy.

126

How many bones are a part of the appendicular skeleton?

Clavicle, Scapula

What are the two bones fo the shoulder girdle?

Clavicle

(Collarbone) Attaches to the manubrum of the sternum medically and to the scapula laterally creating the shoulder joint. Acts as a brace the hold the arm away from the top of the chest and prevents shoulder dislocation.

Scapula

(Shoulder Blades) Triangular shape classified as flat bones. Each of it has a flattened body with two important process.

Acromion

Part of the scapula that connects with the clavicle laterally.

Coracoid

Part of the scapula that points over the top of the shoulder and anchors some of the muscles of the arms.

The glenoid cavity

Part of the scapula that is a shallow socket that receives the head of the humerus

Humerus

Long arm bone with proximal ends that have a rounded head that fits into the glenoid cavity of the scapula.

Intertubercular Sulcus

Part of the humerus that separates the head of the humerus

Trochlea

Part of the humerus that looks like a spool located at the distal medial end of the humerus

Capitulum

Part of the humerus lateral to the trochlea and is ball-like

Coronoid Fossa

Part of the humerus anterior depression in the humerus

Olecranon Fossa

Part of the humerus posterior depression in the humerus

radius, ulna

Bones of the forearm

Interosseous

Shock absorbers in between the radius and ulna and serves as the distributor of the forearm.

Carpals, metacarpals, and phalanges

Bones of the hand

Carpals

Part of the hand that serve as two irregular row of four bones

Metacarpals

Part of the hand that serves as a the palm of the hand. You can see the heads of the metacarpals when you clench your fish.

Phalanges

Part of the hand that represents the bones of the fingers.

Illium

Part of the hip bone that connects posteriorly to the sacrum. Large flaring bone that forms most of the hip.

Ischium

Part of the hip bone that represents the sit down bone because it forms part of the coccyx

Pubis

Part of the hip bone that represents the most anterior part of the coxal bone. Fused anteriorly and the ischium posteriorly.

Acetabalum

Receives the head of the thigh bone

Femur

Heaviest and strongest bone in the body that makes up the thigh.

Tibia

Shinbone that has medial and lateral condyles which articulate with the distal end of the femur to form the knee joint. Contains the medial malleolus which is the inner portion of your ankle bone that can be felt beneath the skin.

Fibula

Contains the lateral malleolus which forms the outer portion of the ankle.

Tarsals, metatarsals, and phalanges

Bones of the foot

Ligaments

Binds the foot bones together

Tendons

Help hold the bones of the foot firmly in arched positions