Science Source Feb 2010

Scanning electron micrograph of the daughter cells of a recent division. The two cells are still joined by a white strand at the image's center.

SEM of of free surfaces of cultured HeLa cells are seen to be covered by large numbers of long slender mircrovilli. Cultured cells are particlarly use...

Transmission electron micrograph of the myelin sheath in a cochlear nerve of a cat. The myelin sheath, appearing as a series of concentric parallel li...

Scanning electron micrograph of a 3T3 cell in culture. This image demonstrates pinocytosis cell drinking, where a cell takes droplets of fluid medium...

Transmission electron micrograph of the zonula continua from gut epithelium of a flea. The zonula continua is a junctional specialization found in inv...

Scanning electron micrograph of microvilli covering the surface of a cell. This image depicts mammalian fertilization, with the flagellum of the sperm...

Scanning electron micrograph (SEM) of a sperm on the surface of a human egg (ovum) during fertilization. The egg has a furry surface which attracts sp...

Transmission electron micrograph showing radiation damage to chromosomes.

Illustration showing the distribution of the sarcoplasmic reticulum around myofibrils of amphibian skeletal muscle. Mammalian muscle, in contrast, has...

Ovarian egg showing a ruptured zoma, which has allowed follicle cells to enter.

TEM of human ovum, 10 day gestation.

Scanning electron micrograph (SEM) of normal circulating human blood. One can see red blood cells, several white blood cells (including lymphocytes, a...

Synaptic fibers and knots on nerve cell. Ganglia provide relay points and intermediary connections between different neurological structures. Mag.= 20...

Thin section of African Swine Fever virus. It has formed in the cytoplasm of a tissue culture of the infected primary swine's kidney tissue. Cells wer...

Phagocytosis: Human white blood cell with ingested yeast; one collapsed.

Transmission electron micrograph of rough endoplasmic reticulum in the basal cytoplasm of a pancreatic acinar cell from a bat. The reticular cisternae...

Transmission electron micrograph of an acinar cell from the pancreas of a bat. The endoplasmic reticulum is continuous, but doesn't appear to be when...

Transmission electron micrograph of the nucleus of the cell. Several organelles are visible, such as the nucleolus, ribosomes, vesicles, and the endop...

Transmission electron micrograph of a human pancreatic acinar cell with secretory granules.

Transmission electron micrograph of an axon from the ciliary ganglion of a chicken. The axoplasm in this cell from the ciliary ganglion contains abund...

Transmission electron micrograph of a portion of the nucleus and adjacent cytoplasm in a monkey Sertoli cell from the terminal segment of the seminife...

Transmission electron micrograph of a basal cell from the epidermis of the ammocoete of Petromyzon fluviatilis. At this high magnification, keratin fi...

Fluorescence photomicrograph of hamster N1L8 cells exposed to antitubulin. Immunofluorescence makes it possible to get better information about the th...

Schematic of the microtrabecular lattice in the cytoplasm of a thinly spread cell in culture as seen with the high voltage electron microscope. The tr...

Diagram of the varying degree of interdigitation of actin and myosin filaments (at right) that accounts for the changes in the pattern of cross-bandin...

The outer segments of the rods and cones of the vertebrate retina and many photoreceptors of invertebrates begin their differentiation as single cilia...

Transmission electron micrograph of the implantation fossa, centriolar adjunct, and base of the flagellum in a chinchilla spermatid. The juxtanuclear...

Transmission electron micrograph of a ciliated cell of the mammalian oviduct. The numbers denote four different cilia in successive stages of ciliogen...

Transmission electron micrograph of a pair of centrioles and the associated Golgi complex in a myelocyte from guinea pig bone marrow. This pair of cen...

Transmission electron micrograph of a centriole. Microtubules are arranged in triplets, organized in a pinwheel structure which forms the walls of the...

Transmission electron micrograph of centrioles of dividing spermatocyte from cock testis, made prior to aldehyde fixation. Three centrioles are visibl...

An example of peroxisomes from the proximal convoluted tubule of rat kidney, containing only crystals.

Some cell types may contain lysosomes and peroxisomes. In routine preparations, these may be similar in size and density. But when stained with the di...

Representative examples of microbodies or peroxisomes are shown here at higher magnification. The plane of section may not include the nucleoid, as in...

Transmission electron micrograph of an area of cytoplasm from a rat liver cell containing peroxisomes. Peroxisomes are abundant in hepatic cells and w...

Diagrammatic reconstruction of the three-dimensional form of the nucleoid in rat hepatic peroxisomes. A peroxisome is an organelle in which two hydrog...

Transmission electron micrograph of the principal cells of the lining epithelium of the human epididymal duct, containing multivesicular bodies and ot...

Transmission electron micrograph of a myelocyte from human bone marrow. This early myelocyte contains numerous azurophil granules, the dark circles at...

Transmission electron micrograph of lysosomes in the interstitial cells of Leydig in the testis of the domestic boar. Additional examples of laminated...

Among the most common inclusions in secondary lysosomes of all cell types are concentric systems of thin dense lamellae that are interpreted as myelin...

Transmission electron micrograph of epithelium from the proximal portion of the caudal epididymis of rabbit. As shown here, certain segments of the ep...

Transmission electron micrograph of the cytoplasm of a cell from a ductulus efferens of a ground squirrel. These epithelia contain membrane-limited sp...

Transmission electron micrograph of lysosomes in the supranuclear region of an epithelial cell from the epididymis of the bandicoot. This image illust...

Transmission electron micrograph of the midpiece of spermatozoa from the dormouse (Glis glis), in longitudinal section. Elongate mitochondria are arra...

Transmission electron micrograph of the flight muscle of a moth. Insect flight muscle with a beat frequency of 50 per second exhibits discrete myofibr...

Transmission electron micrograph of the right ventricular papillary muscle of a cat heart. This image illustrates the intimacy of the association of m...

Transmission electron micrograph of distal convoluted tubules of guinea pig kidney. This image is a vertical section of the base of the epithelium of...

Micrographs representing three stages of mitochondrial division (sample obtained from the gastric mucosa of a mole). In stage A, the free edge of the...

Dividing mitochondrion in a rat's liver. Arrows denote the septum, which plays a role in the partitioning of the organelle. The septum of dividing mit...

Schematic representation of successive stages in mitochondrial division.