Size, Shape and Location of the Heart.  –In this beautiful anatomical chart we obtain an accurate idea of the relative size, shape and position of that wonderful engine, the heart, his tireless efforts to keep the wheels of life and motion are truly surprising, and fill us with amazement at the prodigious work at daily [...]

Lung Air Cells.  — Each air cell varies in size from the seventieth to the one two-hundredth parts of an inch in diameter.  The number of aerosols in the two lungs is truly surprising, they’re been certainly not less than 600,000,000, though according to Dr. Addison’s computation there are 1,700,000,000, equivalent to 1,500 square feet [...]

Interior Arrangement of Lungs. — On turning this flap over we find a vertical section of lungs, showing their anterior arrangements. The lower end of the trachea divides, one portion going to each long. These again subdividing continue to subdivide in geometrical order, growing smaller and smaller with each division, and extending [...]

The Collar Bone.  — The collar bone is fast and that one into the breast bone in the first drip, and at the other into a shoulder blade.  It does holes the shoulder-joint out from the chest, eight in protecting the important vessels of the axilla, and gives the arm a greater range of freedom, [...]

The Shoulder Joint. — The shoulder joint, formed as it is by the shoulder-blade (scapula), collarbone (clavicle), and the arm bone, is most beautifully designed and executed. It comprises a shallow ball and socket joint, the supporting the freest rotary movements. The shallowness of the socket, however, accounts for the frequent dislocations [...]

Bones of the Spinal Column. — The twenty-four bones of which it consists are so stiffly locked together as to form a chain that will bear and support the heaviest burdens, yet so flexible that it will bend like India rubber; within this wondrous column heights of delicate error that would thrill at the [...]

The Spinal Column.  — The spinal column, the lumbar portion of which is here seeing, consists of twenty-four bones, the which are placed pads of cartilage.  Such is the elasticity of these cushions of cartilage, that, though they become condensed to the day, making a shorter in the evening then in the morning, they resume [...]

The Pelvis.  — The pelvis is an irregular-shaped basin, formed by the hip bones and the pubic bones in front.  In the upper and back part is the foot of the spinal column, consisting of a wedge-shaped bone called the sacrum.  It is observed firmly planted between the wide spreading hip bones of the pelvis, [...]

The Ribs.– the ribs are twenty-four in number, arranged in pairs, well moneyed set in the chest.  At the back they are fastened to the spine, confront the seven upper pairs are tied by cartilages to the breast bone, three are fastened to each other in the cartilage above, and two, the floating ribs, are [...]

Composition of the Chest– the chest is composed of bones, cartilages, and ligaments.  Its natural form is that of a cone diminishing upward; and it affords lodgment of the heart, lungs and large blood vessels.  Its walls are formed posteriorly by the seven dorsal bones of the spinal column, and the ribs as far as [...]