Anatomy Notes Day 4: The Bony Thorax and The Arm Bones
Name:
Boney Thorax:
1. The sternum, ribs, and thoracic vertebrae make up the _____________________.
2. The bony thorax is often called the _________________________because it forms a protective cone-shaped cage of
slender bones around the organs of the thoracic cavity (heart, lungs, and major blood vessels.)
Sternum:
1. The sternum (breastbone) is a typical flat bone and the result of the fusion of three bones:
1)
2)
3)
2. The sternum has three important bony landmarks:
1)
2)
3)
Ribs:
1. Twelve pairs of ______________ form the walls of the bony thorax.
2. The ___________________are the first seven ribs and attach directly to the sternum by costal cartilages.
3. The ________________are the next five pairs, and either attach indirectly to the sternum or are not attached to the
sternum at all.
Appendicular Skeleton:
1. The ________________________is composed of 126 bones of the limbs (appendages) and the pectoral and
pelvic girdles, which attach the limbs to the axial skeleton.
The Shoulder Girdle:
1. Each__________________________________, consists of two bones – a clavicle and a scapula.
2. The____________________, or collarbone is a slender, doubly curved bone that attaches to the sternum and to the
scapula where it forms the shoulder joint.
3. Each ______________has a flattened body and two important processes:
1) ____________________________which is the enlarged end of the spine of the scapula
2) ________________________________which is shaped like a beak.
4. Just medial to the coracoid process is the large______________________________________, which serves as a nerve
passageway.
5. The_____________________________, is a shallow socket that receives the head of the arm bone, is in the lateral
angle of the scapula.
Anatomy Notes Day 4: The Bony Thorax and The Arm Bones
Name:
Bones of the Upper Limbs: The Arm:
1. The arm is formed by a single bone, the____________________, which is a long bone.
2. On the opposite head are two bony projections __________________________________________, which are sites of
muscle attachment.
3. In the midpoint of the shaft, is a roughened area called the__________________________________, where the large,
fleshy deltoid muscle of the shoulder attaches.
4. Near the deltoid tuberosity is the ______________________which runs obliquely down the posterior aspect of the
shaft.
5. At the distal end of the humerus, is the_______________________________, which looks like a spool, and the
_______________________________________.
6. Above the trochlea anteriorly to the depression, is the_________________________; and on the posterior surface is
the___________________________________.
7. These two depressions are flanked by____________________________________________, which allow the
corresponding processes of the ulna to move freely when the elbow is bent or extended.
The Forearm:
1. When the body is in the anatomical position, the __________________is the lateral bone of the forearm, that is,
the thumb side.
2. Both proximally, and distally, both the radius and ulna articulate at small_________________________, and the
two bones are connected along the entire length by the____________________________.
3. Both the radius and ulna have a ________________________________at their distal end.
4. Just below the head is a________________________________, where the tendon of the biceps muscle attaches.
5. When the upper limb is in the anatomical position, the_________________________ is the medial bone (on the
finger side) of the forearm.
6. On its proximal end are the anterior coronoid process and the posterior olcranon process, which are separated by the
_____________________________________.
Hand:
1. The eight____________________________, arranged in two irregular tows of four bones each, form the part of
the hand called the carpus or, more commonly, the wrist.
2. The palm of the hand consists of the ________________________and ______________________________are
the bones of the fingers.