FUNCTIONAL ANATOMY CH 1 Flashcards
(110 cards)
what is OSTEOPENIA?
refers to bone mineral density BMD that is lower than normal peak but not low enough to be classified as osteoporosis.
What is OSTEOPOROSIS?
irreversible decrease in mineralized bony tissue.
what is a joint?
a point of articulation between two or more bones, especially such a connection that allows motion.
what is FIBRUOUS JOINTS?
consist of two bones that are united by fibruous tissue and exhibit little or no movement.
what is SYNOVIAL JOINTS?
contain synovial fluid and allow for considerable movement betw articulating bones.
what is hyaline cartilage?
a tough, elastic fibrous connective tissue found in various parts of the body, such as the joints, outer ear, and larynx.
what is FIBROCARTILAGE?
cartilage that allows for greater movement capabilities due to its flexible nature.
what is a articular disc?
a plate or ring of fibrocartilage attached to the joint capsule and separating the articular surfaces of the bones.
what is a joint capsule?
a sac enclosing a joint, formed by an outer fibrous membrane and an inner synovial membrane.
what is a periosteum?
the dense fibrous membrane covering the surface of bones except at the joints and serving as an attachment for muscles and tendons.
what are ligaments?
tough fibrous band of connective tissue that supports internal organs and holds bones together properly in joints.
what are tendons?
a tough band of fibrous connective tissue that connects muscles to bones.
what is synovial membrane?
a layer of connective tissue which lines the joint and produces synovial fluid.
what is bursa?
a tiny fluid filled sac that functions as a gliding surface to reduce friction between tissues of the body.
what is hypermobility?
describes joints that stretch further than is normal.
what is muscle fascia?
thickened connective tissue that envelops a muscle or a group of muscles.
what is myofibrils?
thread like fibrils that make up the contractile part of a striated muscle fiber.
what is myofilaments?
made up of actin and myosin, that are the structural units of a myofibril.
what is myosin?
a contractile protein in muscle cells, responsible for the elastic and contractile properties of muscle. it is commonly referred to as the thick contractile protein.
what is actin?
a protein found in muscle that together with myosin functions in muscle contraction. It is commonly referred to as the thin contractile protein.
what is anatomical position?
a reference posture used in anatomical description in which the subject stands erect w/ feet parallel and arms adducted and supinated, w/ palms facing forward.
what is midline?
the median plane of the body.
what is anterior axillary line?
creased of the axilla (underarm)
what is midaxillary line?
a perpendicular line drawn downward from the apex of the axilla.