In the human body, it is each of the extremities that are fixed to the upper part of the trunk.
It consists of four segments
ARM
SHOULDER
Clavicle
- Long bone,
shaped like "S"
-Located in the
anterosuperior
part of the thorax.
- 2 sides (top and
bottom) 2 edges
(front and back) 2
extremities
(acromial and
sternal)
Scapula
- Is a large, triangular and
flat bone. It is located in
the posterior or
dorso-lateral of the thorax.
-Two faces: anterior and
posterior Three edges:
upper, lateral and medial
Three angles:
superior-medial,
superior-lateral and
inferior.
FOREARM
HAND
Carpal bones
It is composed of
eight bones joined
by ligaments and
forming the skeleton
of the wrist. They
are arranged in two
rows: proximal and
distal
From lateral to
medial
Scaphoid.
Semilunar.
Pyramidal.
Pisiform.
Distal
Trapeze.
Trapezoid. Big
bone Hound
ganchoso.
Metacarpal bones
Is composed of
five metacarpal
bones, which
are thin and
slightly
elongated and
occupy the
entire palm of
the hand.
Phalanges
Are long bones in number of
three for each finger (except
the thumb, which has two),
beginning to count from the
metacarpus: 1st, 2nd and 3rd,
each consists of two faces:
anterior and posterior; And
two extremities: proximal and
distal (upper and lower),
articular both in the 1st and
2nd, and only the upper in
the 3rd.
Radius
Is a long, even and
non-symmetrical bone,
located outside the ulna,
on the outside of the
forearm. Consists of a
body and two extremities,
upper and lower
Ulna
Is a long bone, parallel to
the radius. It is located on
the inside of the forearm;
Is articulated superiorly
with the humerus and the
radius, and the lower part
with the radius and the
carpal bones. It has one
body and two extremities.
Humerus
Is the longest bone of the upper
limbs. They form part of the
superior appendicular skeleton
and are located in the region of
the arm.