Science Source December 1, 2009 DVD

This is a tumor of the meninges, the membranes that line the surface of the brain. It is generally benign (non-cancerous), but its growth can put pres...

A medulloblastoma is a malignant brain tumor that originates in the cerebellum or posterior fossa, and appears as massses of soft, white tissue, often...

Light micrograph of a normal glomerulus. A glomerulus is a capillary ball-shaped structure in the kidney that aids in the formation of urine. This sam...

Bone marrow shows replacement by plasma cells, many of which show cytological abnormalities with nuclear irregularities.

Bone marrow in a patient with CGL (chronic granulocytic leukemia). The bone marrow is replaced by myeloid cells in varying stages of differentiation....

Hypertrophy (excessive growth) of cardiac muscle in response to valve disease. Transverse slices of a normal heart and a heart with hypertrophy of the...

Benign prostatic hyperplasia (BPH), also known as nodular hyperplasia, refers to the increase in size of the prostate in middle-aged and elderly men....

Gross specimen showing a left ventricular aneurysm. After an infarct (tissue death caused by decreased blood supply), stretching of collagenous scar c...

The lower lobe has been surgically resected. Large dilated air passages extend out to the lung periphery.

Generalized emphysema. Right: centriacinar emphysema portion of affected lung, in which the dilated air spaces are surrounded by normal-sized alveoli....

Coalworker's pneumoconiosis, also known as black lung disease. Progressive massive fibrosis. Gough-Wentworth thin section of whole lung. Dense collage...

Malignant mesothelioma: Mesothelioma is seen as a thick sheet of white tumor, which encases the whole of the lung. It is almost always caused by asbes...

Atheroma (plaque resulting from atherosclerosis) in segments of aorta. Small fatty streaks are visible as pale areas beneath the endothelium in the ao...

Illustration of the complications of arterial atheroma (plaque caused by atherosclerosis). (a) Narrowing of artery by atheroma. (b) Thrombus on plaque...

Small arterial changes in benign hypertension. Hypertrophy and thickening of elastic lamina, fibroelastic thickening of the intima, and reduction in t...

Accelerated hypertension change in arterioles. Fibrinoid necrosis is visible as replacement of the wall by material stained bright red.

Appearances of myocardial infarct after weeks and months. Myocardial infarction or a heart attack occurs when blood flow to part of the heart is obstr...

Berry aneurysm. This is the circle of Willis, with anterior, middle and posterior cerebral arteries linked by communicating vessels.

Through the midbrain, pigmented neurons have been lost from the substantia nigra, which is abnormally pale.

Benign prostatic hyperplasia (BPH), also known as nodular hyperplasia, refers to the increase in size of the prostate in middle-aged and elderly men....

This image shows the junction between normal ectocervical epithelium and severe full-thickness CIN.

This image shows mild-to-moderate atypia of cervical epithelium (CIN I - CIN II). The atypical cells are confined t othe deeper parts of the epitheliu...

This image shows foci of early microinvasion arising in an area of CIN III.

Cervical cytology smear in CIN. This cytology preparation shows a clump of cervical epithelial cells demonstrating moderate and severe dyskaryosis.

Mucinous tumors of the ovary. A benign mucinous tumor of the ovary has shiny mucoid content.

Fibrothecoma of the ovary. A large, well circumscribed, spherical tumor with whorled cut-surface appearance replaces one ovary.

Benign cystic teratoma of the ovary (dermoid cyst). Ovarian cyst contains a partly gelatinous material, in which some hairs can be seen.

A micrograph showing fibrocystic disease. Shown here is a proliferation of ducts, lobular tissue and stromal support tissues to form a mass of cystic...

Bronchogram of a healthy lung. Bronchography renders the airways visible on X-ray film by introduction of a radio-opaque contrast medium into the wind...

Limonite, an iron ore.

Hemimorphite, a hydrous zinc silicate mineral, is a minor ore of zinc.

Finger clubbing, thickening of the tissues at base of the nail, seen in pulmonary tuberculosis, bronchiectasis, empyema, endocarditis, heart disease a...

Dislocated shoulder, accidental injury.

Dislocated shoulder, accidental injury.

Human ear.

Light micrograph of smooth muscle from human viscera. Such muscles produce slow, lengthy contractions under the direction of the autonomic nervous sys...

Human knee joint, showing the articulation of the femur and the tibia.

Amniocentesis; withdrawal of fluid from the amnion during 12-16 weeks of pregnancy by inserting needle into uterus; the fluid can be assessed for foet...

Subungual glomus tumor. Painful red swelling produced by malformation and overgrowth of a glomus (small communication between a tiny artery and a vein...

Nicotine stomatitis, also known as smoker's keratosis, an oral pathological condition that appears in the hard palate of the mouth.

Subclavian thrombosis affected blood vessels shown by infrared photography.

Light micrograph of a longitudinal section of smooth muscle from the stomach wall. Magnification: 350x.

Telophase is the final stage of mitosis. Reconstruction of the daughter nuclei takes place and the cytoplasm of the cell divides, giving rise to two d...

In Metaphase, chromatid pairs lie suspended on the spindle, midway between the centrioles. Human blood marrow smear magnified 400x. The sample in this...

In Anaphase, chromatid pairs separate and move or are drawn along the spindle fibers toward the two centrioles. Human blood marrow smear magnified 400...

In late Anaphase, chromatid pairs separate and move or are drawn along the spindle fibers toward the two centrioles. Human blood marrow smear magnifie...

Late anaphase, almost telophase, and the onset of cell cleavage. Chromatid pairs separate and move or are drawn along the spindle fibers toward the tw...

Plasma cells and differentiated T-lymphocytes ("T Cells") in a human bone marrow smear. Magnification 200x. The sample in this light micrograph was pr...

In Anaphase, chromatid pairs separate and move or are drawn along spindle fibers toward the two centrioles. Human blood marrow smear magnified 400x. T...

Light micrograph showing waves of contraction in a smooth muscle layer of intestinal wall, resulting in peristalsis (propelling contents through the d...