: Functions as a support frame, protects internal organs, and allows for movement. It consists of the skull, spinal column, rib cage, and the skeleton of the upper and lower limbs.
: Skeletal muscles (striated) are responsible for voluntary movements, while smooth muscles control internal organs and are involuntary. gdz po biologii 8 klass r.t opora i dvizhenie onlain sonin
: A lack of physical activity can lead to weakened muscles and cardiovascular issues. : Functions as a support frame, protects internal
: Bones grow in length through the division of cartilage cells and in thickness through the periosteum (the outer membrane). Muscular System and Movement : A lack of physical activity can lead
: Muscles often work in pairs (like the biceps and triceps); when one contracts, the other relaxes to produce movement at a joint.
: Maintaining correct posture is essential during childhood and adolescence while bones are still growing to prevent conditions like scoliosis.
: Bones are made of organic substances (which provide flexibility) and inorganic minerals like calcium (which provide hardness).