Science Source Feb 2010

Light micrograph of a section through a fig tree stem (Ficus sp.). The large holes are cross-sections of xylem, vascular tissue used to transport wate...

Transverse section of a Datura Stem (Datura stramonium). Light micrograph of a section through the stem. The magnification is 32 times when printed 10...

Transverse section of a Datura Stem (Datura stramonium). Light micrograph of a section through the stem. The magnification is 200 times when printed 1...

Transverse section of a Datura Stem (Datura stramonium). Light micrograph of a section through the stem. The magnification is 200 times when printed 1...

Transverse section of a Cow Parsley stem. Cow Parsley (Anthriscus sylvestris), also known as Wild Chervil, Wild Beaked Parsley, and Keck. It is a herb...

Butcher's broom, also known as box holly or knee holly (Ruscus aculeatus). Butcher's broom is an aromatic, diuretic, mildly laxative herb that reduces...

Butcher's broom, also known as box holly or knee holly (Ruscus aculeatus). Butcher's broom is an aromatic, diuretic, mildly laxative herb that reduces...

Butcher's broom, also known as box holly or knee holly (Ruscus aculeatus). Butcher's broom is an aromatic, diuretic, mildly laxative herb that reduces...

Transverse section of a Black-Eyed Susan Vine (Thunbergia alata) stem. Light micrograph of a section through a stem. The magnification is 32 times whe...

Light micrograph of a section through a bamboo stem. The large holes are cross-sections of xylem, vascular tissue used to transport water and minerals...

Light micrograph of a section through a bamboo stem. The large holes are cross-sections of xylem, vascular tissue used to transport water and minerals...

Light micrograph of a section through a bamboo stem. The large holes are cross-sections of xylem, vascular tissue used to transport water and minerals...

Acacia dealbata (Silver Wattle) is a species of Acacia native to southeastern Australia. It is a fast growing evergreen tree or shrub growing up to 30...

Transverse section of a Black Bryony stem. Light micrograph of a section through the stem. Black Bryony (Tamus communis) is a flowering plant in the y...

Transverse section of a Tamarisk stem (Tamarix tetrandra). This is a micrograph of a section through the stem. The magnification is 32 times when prin...

Transverse section of a Tamarisk stem (Tamarix tetrandra). This is a micrograph of a section through the stem. The magnification is 200 times when pri...

Transverse section of a Tamarisk stem (Tamarix tetrandra). This is a micrograph of a section through the stem. The magnification is 200 times when pri...

Transverse section of Stinking Hellebore (Helleborus foetidus), a poisonous plant. Light micrograph of a section through a stem. The magnification is...

Transverse section of Stinking Hellebore (Helleborus foetidus), a poisonous plant. Light micrograph of a section through a stem. The magnification is...

Transverse section of Stinking Hellebore (Helleborus foetidus), a poisonous plant. Light micrograph of a section through a stem. The magnification is...

Transverse section of Stinking Hellebore (Helleborus foetidus), a poisonous plant. Light micrograph of a section through a stem. The magnification is...

Paramecium.

Adenovirus.

Crystal: ibuprofen.

Crystal: aspirin.

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

Photomicrograph of hamster N1L8 cells stained with antibody against a 58,000 dalton protein extracted from 10 nm filaments. Immunofluorescence makes i...

Transmission electron micrograph of mitochondria from snake adrenal adjacent to a highly ordered array of endoplasmic reticulum.

Transmission electron micrograph of the relationship between the nuclear envelope and the Golgi complex. Transport (intermediate) vesicles maintain co...

Transmission electron micrograph of intrinsic muscle from the swim bladder of the toadfish. This view shows a one-sarcomere length of sarcoplasmic ret...

Section of reticulum in an adrenocortical cell of a human fetus at 27 weeks. The loops and spirals visible are multiple ribosomes aligned on the same...

Transmission electron micrographs of the successive stages of flagellum formation in spermatids. In the image labeled "B," the second centriole is out...

Transmission electron micrograph of a centriole from embryonic chick pancreas. Microtubules are arranged in triplets, organized in a pinwheel structur...

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

Transmission electron micrograph of a mitochondrial DNA molecule from an oocyte of Xenopus laevis. When disrupted mitochondria are spread by surface t...

Transmission electron micrograph of annulate lamellae in oocytes of sea urchin (Arbacia sp.). Annulate lamellae consist of membrane-bound cisternae in...

Transmission electron micrograph of the epidermis from the muzzle of a cow (Bos taurus). There are an abundance of desmosomes in stratified squamous e...

TEMs of Kleinschmidt preparations showing: (a) circular DNA of OX 174RF 21S; (b) molecular complexes resulting from the reaction of this DNA with E. c...

Transmission electron micrograph of mitochondria in a brown adipose cell from a bat. These spherical mitochondria are large, as seen when compared to...

An electron micrograph of a capillary in cross-section. THE CELL 2nd edition.

Transmission electron micrograph of a nerve axon and its surrounding myelin sheath. The myelin sheath is an insulating layer of myelin that surrounds...

Transmission electron micrograph of the nucleus and adjacent manchette of rodent spermatids. The microtubules which comprise the manchette are joined...

This is an illustration of the successive stages in the fertilization of a mammalian ovum.

Intestinal villi with capillariies. Villi are finger-like projections from the inner lining of the small intestine that serve to increase the surface...

Scanning electron micrograph (SEM) of cancellous (spongy) bone of the human shin. Bone tissue is either compact or cancellous. Compact bone usually ma...

Cross-section of human cerebellum. The cerebellum (Latin for little brain) is the region of the brain that helps integrate perception, coordination an...

Scanning electron micrograph (SEM) of cancellous (spongy) bone of the human shin. Bone tissue is either compact or cancellous. Compact bone usually ma...

Scanning electron micrograph (SEM) of cancellous (spongy) bone of the human shin. Bone tissue is either compact or cancellous. Compact bone usually ma...

Craters on the moon.

Transmission electron micrograph of a myelin sheath, showing myelin, inner mesaxon and outer mesaxon. The myelin sheath is an insulating layer of myel...