Pores Collection (page 2)

Beech tree leaf, light micrograph
Beech tree leaf. Light micrograph of a section through the leaf of a common beech tree (Fagus sylvatica), showing the midrib

Sweet pea stem, light micrograph
Sweet pea stem. Light micrograph of a section through the hollow stem of a sweet pea (Lathyrus odoratus) plant, showing a ring of vascular bundles

Beech tree leaves, light micrograph
Beech tree leaves. Light micrograph of a section through two leaves from different parts of a common beech tree (Fagus sylvatica)

Osteoporotic bone, artwork
Osteoporosis. Computer artwork of osteoporotic bone. Osteoporosis (brittle bone disease) causes a reduction in overall bone mass and an increase in the bones porosity

Aquaporins, artwork
Aquaporins. Computer artwork of water molecules (red and white) passing through pores (yellow) in a cell membrane (blue). These pores are proteins known as aquaporins that are embedded in

Photosynthesis, diagram
Photosynthesis. Diagram showing the inputs and outputs (coloured arrows) involved in photosynthesis in the leaf of a plant

mRNA leaving the nucleus, artwork. mRNA (messenger ribonucleic acid, orange) is the intermediary molecule between DNA (deoxyribonucleic acid) and its protein product

Radiolarian, SEM
Radiolarian. Coloured scanning electron micrograph (SEM) of the shell of a radiolarian. Radiolaria are single-celled protozoans that are found in marine plankton

Bracket fungus (Daedaleopsis confragosa)
Blushing bracket fungus (Daedaleopsis confragosa). Close-up of the underside of the blushing bracket fungus showing its pores. The pores are the ends of the tubes within which the spores are produced

Radiolarian skeleton, artwork
Radiolarian skeleton. Computer artwork of the skeleton (test) of a radiolarian. Radiolaria are single-celled protozoans that are found in marine plankton

Nuclear pore complexes, SEM
Nuclear pore complexes. Coloured scanning electron micrograph (SEM) of the surface of a cell nucleus showing the numerous nuclear pore complexes (NPCs, rings) in its envelope

Blocked pore in acne, artwork
Blocked pore in acne, computer artwork. Sweat pore (centre) that has become blocked (centre) due to acne. Acne is a skin disorder in which the sebaceous glands of the skin become inflamed (red areas)

Plant stomata, light micrograph
Plant stomata. Light micrograph of stomatal pores on the surface of a kidney bean (Phaseolus sp.) leaf. The stomata are gaps (white) within two guard cells (blue, kidney-shaped)

Tea leaf, light micrograph
Tea leaf. Light micrograph of a cross-section through a tea (Camellia sinensis) leaf. The upper and lower epidermis on the surfaces of the leaf are blue

Plant stoma, light micrograph
Plant stoma. Light micrograph of a stomatal pore (centre) on the surface of a stinging nettle (Urtica dioica) leaf. The stomata are gaps (white) within two guard cells (kidney-shaped)

Mushroom surface, SEM
Mushroom surface. Coloured scanning electron micrograph (SEM) of the spore-bearing surface of a hen of the woods mushroom (Grifola frondosa). This surface is found on the underside of the mushroom

Ivy stem, SEM
Ivy stem. Coloured scanning electron micrograph (SEM) of the surface of an ivy plant stem. The star- shaped trichomes, a type of modified hair cell, may function in preventing water loss

Section through leaf of Zinnia
False-colour scanning electron micrograph of the under surface of a leaf, Zinnia elegans, showing a part of the epidermis removed to reveal the spongy mesophyll layer (left) under the surface

Sunflower leaf, SEM
Sunflower leaf. Coloured scanning electron micrograph (SEM) of the underside of a sunflower leaf (Helianthus annuus). The green and yellow structures are trichomes

Open stomata, SEM
Open stomata. Coloured scanning electron micrograph (SEM) of open stomata on the surface of a tobacco leaf (Nicotiana tabacum)

Tomato leaf surface, SEM
Tomato leaf surface. Coloured scanning electron micrograph (SEM) of the surface of a tomato leaf (Lycopersicon esculentum). It is covered in trichomes (red), which secrete oil, and hairs

Daisy leaf surface, SEM
Daisy leaf. Coloured scanning electron micrograph (SEM) of the surface of a daisy leaf (family Asteraceae, formerly Compositae). Three stomata (leaf pores) can be seen

Plant pores, SEM
Plant pores. Coloured scanning electron micrograph (SEM) of stomata (pores) on the pistil of a bellflower (Adenophora sp.). Stomata are the site of gaseous exchange, or respiration

Open stoma, SEM
Open stoma. Coloured scanning electron micrograph (SEM) of an open stoma on the surface of a tobacco leaf (Nicotiana tabacum)

Caterpillar spiracles, light micrograph
Caterpillar spiracles. Light micrograph of part of the skin of a caterpillar showing part of the tracheal system for bringing oxygen to the body tissues

Caterpillar skin, light micrograph. This section of part of the skin shows two half segments. The skin is covered in small hairs or setae (black), and brown structures called tubercles and verrucae

Caterpillar spiracle, light micrograph
Caterpillar spiracle. Polarised light micrograph of part of the skin of a caterpillar, showing an air hole (spiracle, dark oval, lower right) leading to a breathing tube (trachea)

Zeolite A crystal structure
Zeolite A crystal, molecular model. Zeolite A is a synthetic alumino-silicate material manufactured for use as a molecular sieve

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"Pores: Unveiling the Hidden World" Pores, those tiny openings found in various natural and man-made structures, hold secrets waiting to be discovered. From osteoporotic bone to leaf pores, these microscopic gateways offer a glimpse into the intricate workings of our world. In the realm of science, scanning electron microscopy (SEM) has allowed us to explore the fascinating intricacies of pores. Picture No. 11675628 reveals the delicate network of osteoporotic bone, highlighting how these minuscule channels contribute to its strength and resilience. Moving on from bones to nature's wonders, SEM captures the beauty of leaf pores or stomata on an Elder leaf. These minute structures play a vital role in regulating gas exchange for photosynthesis and transpiration in plants. Venturing deeper into unseen realms, we encounter Acrosphaera radiolarian under SEM. These marine microorganisms showcase their complex skeletal structure with countless intricate pores that aid in nutrient absorption and locomotion. Zooming even closer under SEM's watchful eye, we discover small white butterfly eggs revealing their secret through magnification. The detailed examination unravels unique pore patterns that serve as entry points for oxygen exchange during embryonic development. Shifting gears from nature's wonders to oceanic marvels, a close-up portrait captures a tiger shark gracefully gliding near Hawaii's surface. Its sleek skin bears evidence of tiny dermal denticles with minute pores acting as sensory receptors within this majestic predator's domain. Delving further underwater brings us face-to-face with another inhabitant - the Grey Reef Shark. Its textured skin showcases numerous specialized dermal denticles housing microscopic openings that enhance hydrodynamics while navigating vast ocean depths. Stepping away from living organisms but still exploring hidden worlds brings us to brown-rot fungi thriving at Clumber Park in Nottinghamshire. A close-up detail highlights their porous surfaces responsible for breaking down wood fibers—a crucial step in the natural recycling process.