2. Acromioclavicular joint – joint formed by the distal clavicle and the acromion process of the scapula Anatomical snuff box – the space at the base of the thumb created by the extensor pollicis longus and brevis Anterior cruciate ligament – a ligament crossing through the knee joint that attaches from the anterior tibia to the posterior femur. It limits anterior movement of the tibia from the femur as well as rotation of the tibia

3. Articular surfaces – the ends of bones which move on each other. These surfaces are covered with a thin layer of cartilage (hyaline cartilage) to ensure smooth movement Appendicular skeleton – consists of the bones of the shoulder and the upper extremities, and the hips and the lower extremities. These bones form the appendages and attach to the axial skeleton

4. Articulation – a joint between bones, the manner of connecting by a joint Axial skeleton – composed of the bones of the skull, the thorax, and the vertebral column. These bones form the axis of the body Axilla – arm pit Biceps – muscle on front of upper arm Bone – a supportive rigid connective tissue consisting of an abundant calcified matrix enclosing many branched cells

5. Bursa – a fluid filled sac or saclike cavity that allows a muscle or tendon to slide over bone (thereby eliminating friction) Calcaneous – heel bone Cartilage – a connective tissue characterized by its nonvascularity and firm consistency Cervical – of the neck, especially the seven vertebrae in the neck Chondral – pertaining to cartilage

6. Coccyx – the 4 rudimentary bones at lowest end of the backbone; the vestigial human tail Costochondral – rib and its cartilage Cranial – of or pertaining to the skull or superior part of the body, opposed to caudal Cruciate – cross shaped Cubital fossa – triangular area on the anterior aspect of the forearm directly opposite the elbow joint (the bend of the elbow)

7. Cutaneous – skin Dermatome – segmental skin area innervated by various spinal cord segments Dermal – pertaining to the dermis; cutaneous Diarthrodial joint – a ball and socket joint Digit – finger/toe Epiphysis – growth plate

8. Fascia – fibrous membrane that covers, supports, and separates muscles Hamstrings – a muscle group in the posterior thigh consisting of the semitendinosus, semimembranosus, and biceps femoris Hypothenar eminence – intrinsic muscles of the thumb Iliac crest – the superior border of the iliac bone; a contusion to this area is called a hip pointer

9. Joint capsule, articular capsule, synovial capsule – a saclike, fibrous membrane that surrounds a joint; often including or interwoven with ligaments Ligament – a band of flexible, tough, dense white fibrous connective tissue connecting the articular ends of the bones and sometimes enveloping them in a capsule Longitudinal arch – from heel to toes on the under surface of the foot

10. Lumbar – vertebral column extending from the twentieth through the twenty-fourth vertebrae; low back Malleolus – a rounded bony protuberance on each side of the ankle joint Menisci – curved fibrocarilages used to deepen the articular facets of the knee Meniscus – in anatomy a crescent shaped structure serving to adapt the articular surfaces to one another

11. Muscle – a tissue composed of contractile fibers or cells. A contractile organ composed of muscle tissue, affecting the movements of the organs and parts of the body Nerve – a bundle of nerve fibers, usually outside the brain or spinal cord Phalanges – bones of the fingers or toes Plantar fascia – tough bands of tissue on the sole of the foot

12. Popliteal space – area behind the knee joint Quadriceps – the muscle group in the anterior thigh consisting of the rectus femoris, vastus medialis, vastus intermedius, and vastus lateralis Rotator cuff – the muscle group in the shoulder consisting of the subscapularis, supraspinatus, infraspinatus, and teres minor

13. Sesamoid bone – a small bone implanted in a tendon Tendon – a band of dense fibrous tissue forming the termination of a muscle and attaching to a bone Thoracic – portion of vertebral column extending from the eighth through the nineteenth vertebrae; mid/upper back Thenar eminence – intricinsic muscles of the thumb that include the abductor policis brevis, flexor pollicis brevis, opponens pollicis, and adductor pollicis