Integumentary System
This is the most abundant cell type in the epidermis and produces the protein keratin.
What are keratinocytes?
This type of bone marrow is the site of hematopoiesis.
What is red bone marrow?
This is the last major fontanel to close.
What is the anterior fontanel?
This connective tissue structure attaches muscle to bone.
What is a tendon?
This protein makes up the thick filaments of skeletal muscle.
What is myosin?
This pigment protects the skin from ultraviolet radiation.
What is melanin?
The sternum is an example of this type of bone.
What is a flat bone?
There are this many pairs of ribs that articulate directly or indirectly with the sternum.
What are 12 pairs?
Movement of a body part toward the body's main axis is called this.
What is adduction?
The contraction of this muscle assists with inspiration.
What is the diaphragm?
This substance lubricates the ear canal and traps debris before it can reach the eardrum.
What is cerumen?
Growth hormone stimulates the liver to produce this substance, which promotes bone growth.
What is somatomedin?
This bone is located between the mandible and the larynx.
What is the hyoid bone?
The elbow is an example of this type of synovial joint.
What is a hinge joint?
This band of the sarcomere is associated with the dark band and contains the thick filaments.
What is the A band?
One component of sweat is this nitrogenous waste product.
What is urea?
This type of cartilage is found in intervertebral discs.
What is fibrocartilage?
These two bones form the inferior margin of the orbit.
What are the maxilla and zygomatic bones?
This oily fluid is produced by the synovial membrane and helps lubricate a joint.
What is synovial fluid?
This neurotransmitter binds to receptors at the motor end plate to initiate skeletal muscle contraction.
What is acetylcholine?
Keratinocytes can be found throughout these structures of the epidermis and may be alive or dead depending on their location.
What are the epidermal strata?
Endochondral ossification begins with a model made primarily of this type of cartilage.
What is hyaline cartilage?
Identify the bone that is not a facial bone: nasal, maxilla, mandible, zygomatic, or temporal.
What is the temporal bone?
In the body's mechanical system, a joint can serve as this part of a lever system.
What is a fulcrum?
A motor unit consists of one motor neuron and these.
What are the multiple muscle fibers it controls?