Science Source December 1, 2009 DVD

Light micrograph of active bone marrow, which appears red in this image. Active bone marrow is found in bones at birth.

Light micrograph of bone marrow. As age advances between birth and twenty years, red bone marrow is gradually replaced by yellow bone marrow (as shown...

Light micrograph of a Primitive Stem Cell in the blood stream of a fetus. PSC levels are higher in fetuses than in post-natal life because they migrat...

Light micrograph of a megakaryocyte, the cell that produces blood platelets, in bone marrow.

Nucleus of a Megakaryocyte. The sample in this light micrograph was prepared with a "Wright's Stain."

Light micrograph of mast cells, stained dense purple, in connective tissue underlying the tracheal surface.

Wegener's granulomatosis: arteritis (inflammation of arterial walls) on the legs. The disorder is uncommon and causes inflammation of blood vessels wh...

Wegener's granulomatosis close-up.

Patient with varicose veins marked for operation. Severe varicose veins; such veins are distended, lengthened, and tortuous; they may be inherited or...

Patient with active pulmonary tuberculosis and myositis.

Hereditary telangiectasia; bloodspots on the tongue.

Arm of woman with thrombophlebitis; vein inflammation caused by a blod clot.

Removed artery showing numerous atheromas (plaque). Atherosclerosis is the thickening and hardening of the arterial wall due to a buildup of plaque in...

Thromboangiitis obliterans or Buerger's disease symptoms on patient's toes. This rare disease is characterized by inflammation and thrombosis (clottin...

Thrombosis of the axillary vein. Thrombosis is the formation of a blood clot (thrombus) in a blood vessel. The clot can reduce blood flow and result i...

Fissured tongue is a benign condition characterized by grooves in the dorsum of the tongue. It may be inherited and is seen in Melkersson-Rosenthal sy...

An oral ulcer is a type of open sore inside the mouth.

An oral ulcer is a type of open sore inside the mouth.

Pressure sore ulceration (also known as bedsores) on a patient's right heel. Pressure sores are ulcers that develop on the skin of bedridden, unconsci...

Close up of an ulcer on a patient's big toe.

Varicose vein removed from a patient. Varicose veins are twisted, enlarged veins that commonly form in the leg and are generally a cosmetic concern.

TS leaf of maize (Zea), for VS stomata, one open and one closed. Magnification: x300.

Paramecium Caudatum.

Lophopus; fixed and stained individuals showing their complex structure. Lophopus is a type of Bryozoan, which is a common inhabitant of freshwater an...

Color enhanced scanning electron micrograph (SEM) of Cimex lectularius, the Human Bed Bug, bloodsucking nocturnal parasite. The adult is brown, oval,...

Color enhanced transmission electron micrograph (TEM) of neuromuscular junction in smooth muscle. Smooth muscle is a type of non-striated muscle found...

Color enhanced transmission electron micrograph (TEM) of neuromuscular junction in smooth muscle. Smooth muscle is a type of non-striated muscle found...

Color enhanced transmission electron micrograph (TEM) of neuromuscular junction in smooth muscle. Smooth muscle is a type of non-striated muscle found...

Color enhanced transmission electron micrograph of Langerhans' cells. Langerhans' cells are located in all layers of the epidermis but are most easily...

Color enhanced transmission electron micrograph of Langerhans' cells. Langerhans' cells are located in all layers of the epidermis but are most easily...

Color enhanced transmission electron micrograph of Langerhans' cells. Langerhans' cells are located in all layers of the epidermis but are most easily...

Color enhanced transmission electron micrograph of a melanocyte. Melanocytes are thought to be neuroectodermally-derived cells whose main function is...

Color enhanced transmission electron micrograph of a melanocyte. Melanocytes are thought to be neuroectodermally-derived cells whose main function is...

Color enhanced transmission electron micrograph of a melanocyte. Melanocytes are thought to be neuroectodermally-derived cells whose main function is...

Transmission electron micrograph (TEM) of infective particle of polio virus. The icosahedral capsids of protein contain RNA; these lie within an outer...

Transmission electron micrograph (TEM) of infective particle of polio virus. The icosahedral capsids of protein contain RNA; these lie within an outer...

Transmission electron micrograph (TEM) of infective particle of polio virus. The icosahedral capsids of protein contain RNA; these lie within an outer...

Transmission electron micrograph (TEM) of a bone cell (osteocyte). An osteocyte is an osteoblast that has become entrapped in the bone matrix. Color e...

Transmission electron micrograph (TEM) of a bone cell (osteocyte). An osteocyte is an osteoblast that has become entrapped in the bone matrix. Color e...

Transmission electron micrograph (TEM) of a bone cell (osteocyte). An osteocyte is an osteoblast that has become entrapped in the bone matrix. Color e...

Transmission electron micrograph (TEM) of influenza A virus. Magnification: 25,000x. Color enhancement of 7Y3171.

Transmission electron micrograph (TEM) of influenza A virus. Magnification: 25,000x. Color enhancement of 7Y3171.

Transmission electron micrograph (TEM) of influenza A virus. Magnification: 25,000x. Color enhancement of 7Y3171.

Transmission electron micrograph (TEM) of a steroid-secreting adrenal cell. Magnification x9,000. Color enhancement of 9M8875.

Transmission electron micrograph (TEM) of a steroid-secreting adrenal cell. Magnification x9,000. Color enhancement of 9M8875.

Transmission electron micrograph (TEM) of a steroid-secreting adrenal cell. Magnification x9,000. Color enhancement of 9M8875.

Transmission electron micrograph (TEM) of thyroid follicles. Detail of simple cuboidal epithelium that lines the follicles and secretes hormones T3 an...

Transmission electron micrograph (TEM) of thyroid follicles. Detail of simple cuboidal epithelium that lines the follicles and secretes hormones T3 an...

Transmission electron micrograph (TEM) of thyroid follicles. Detail of simple cuboidal epithelium that lines the follicles and secretes hormones T3 an...

Giant Prickly pear (Opuntia echios). Internal structure of stem. Santa Cruz, Galapagos.