The Human Skeleton. The human skeleton consists of 206 bones. We are actually born with more bones (about 350), but many fuse together as a child grows. bones support your body and allow you to move. contain a lot of calcium (an element found in milk, broccoli, and other foods).
The Human Skeleton
The human skeleton consists of 206 bones.
We are actually born with more bones (about 350), but many fuse together as a child grows
bones support your body and allow you to move
contain a lot of calcium (an element found in milk, broccoli, and other foods)
manufacture blood cells and store important minerals.
The smallest bone is the stirrup bone inside the ear.
HAMMER ANViL STiRRUP
The longest bone in our bodies is
the femur (thigh bone).
Each arm contains 3 bones
humerus, in the upper arm
radius and ulna in the forearm
Each hand has 27 bones in it.
8 carpals in the wrist
5 metacarpals in the palm,
14 phalanges in the fingers.
These are 2 of the arm bones not the hand
Femur - the thigh bone
Patella - the knee cap
Tibia - the larger of the two leg bones located below the knee cap
Fibula - the smaller of the two leg bones located below the knee cap
the first set of vertebral bones of the spine
located beneath the skull
there are 7 cervical vertebrae consists of 7 vertebral bones, named the C1, C2, C3, C4, C5, C6, and C7.
the primary function of the cervical vertebrae is protection of the spinal cord and support of the body.
these vertebrae can flex and extend to allow for movement.
generally smaller than the other vertebrae
vertebrates beneath the cervical vertebrae
the middle segment of the spine
consists of 12 bones called T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, and T12
these bones increase in size and width from T1 to T12.
larger than the cervical vertebrae but smaller than the lumbar vertebrae.
houses the spinal cord and protects the spinal cord
the third curve of the spine
Beneath the thoracic vertebrae
consists of 5 bones – the L1, L2, L3, L4, and L5
the largest vertebral bones
each individual bone increases in
function is the protection of the spinal cord.
also allows for much of human body motion
supports much of the human body’s weight.
fixed joint is a joint between two bones that doesn’t move.
a good example of this is in the skull - the skull plates don't move together or against each other, but they are connected or fused
Hinge joints are places in the human skeleton where the ends of bones meet and rotate
examples of hinge joints in the human body are the elbow, the knee, the ankle, and the knuckles
The most range of movement by the joints is provided by a "ball-and- socket" joint
which the spherical head of one bone lodges in the spherical cavity of another
In the shoulder joint, the humerus (upper arm bone) fits into the socket of the shoulder blade. Because the socket is shallow and the joint loose, the shoulder is the body's most mobile joint.
"Gliding" joints permit a wide range of mostly sideways movements - as well as movements in one direction –
a pivot joint near the top of the spine allows the head to swivel and bend. Other pivot joints, in the forearm and lower leg, allow the wrist and ankle to twist.
The Pelvic Bones
a ring-like structure of bones at the lower end of the trunk. The two sides of the pelvis are actually three bones (ilium, ischium, and pubis) that grow together as people age
the bone that connects the humerus (upper arm bone) with the
CLAVICLE (collar bone).
A small, U-shaped bone situated centrally in the upper part of the neck, beneath the mandible but above the larynx near the level of the third cervical vertebrae
The hyoid is (uniquely in the vertebrate skeleton) not joined to any other bone but is suspended in position by muscles that connect it to the mandible