Function 2: Support, move, and cover itself

1
Function 2 Support, move, and cover itself
A. Skeletal System supports the body, protects
delicate organs, and helps move the body(Also
makes blood cells and stores fat and minerals)
Important Terms and Parts Bones 206 in adult
body bone cells surrounded by non-living
materials (calcium, protein) marrow makes blood
cells. Cartilage tissue that is more flexible
than bone keeps bones from grinding together in
joints and gives shape to nose and ears (p.
397). Joints where bones meet (p. 398)Ex.
Ball-and-Socket (shoulder), Hinge (elbow, knee),
Gliding (wrist), Pivot (1st vertebra) Ligaments
tissue that connects bones to other bones.
Tendons tissue that connects bones to
muscles.
2
Function 2 Support, move, and cover itself
B. Muscular System moves bones and internal
organs
Important Terms and Parts Voluntary you can
consciously control these muscles. Involuntary
you can not consciously control these
muscles. Type 1 Skeletal Muscle Moves bones
they are attached to bones by tendons.
Voluntary. Usually come in pairs. Muscles can
only pull they never push. Type 2 Smooth
Muscle Lines internal organs such as esophagus,
stomach, arteries Keep your internal organs
working. Involuntary. Type 3 Cardiac Muscle
Found only in heart looks like skeletal muscle
but acts like smooth muscle.
3
Function 2 Support, move, and cover itself
C. Skin covers body and internal organs,
protects the body from invaders, keeps in
moisture, gets rid of some wastes, makes hair
and nails, and senses the environment.
Important Terms and Parts Epidermis upper
layers of skin makes new skin cells to replace
dead cells that are constantly flaking
off. Dermis lower layers of skin very
stretchy contains many structures like blood
vessels, oil and sweat glands, sense receptors,
and hair follicles (p. 408). Oil Glands
provide oil to keep skin and hair from drying
out. Sweat Glands remove wastes like water,
salts, urea, and excess heat as sweat. Sense
Receptors nerve endings that can feel cold,
hot, pain, pressure, and touch.