Cytological Collection (#4)

Stem cell dying, SEM
Stem cell dying. Coloured scanning electron micrograph (SEM) of a stem cell undergoing apoptosis, or programmed cell death. Apoptosis occurs when a cell becomes old or damaged

Islet of Langerhans beta cell, TEM
Islet of Langerhans beta cell. Transmission electron micrograph (TEM) of a section through a beta cell in an islet of Langerhans in the pancreas

Pancreatic acinar cell, TEM
Pancreatic acinar cell. Transmission electron micrograph (TEM) of a section through an enzyme-secreting acinar cell in the human pancreas, showing the nucleus (dark purple, centre)

Basophil white blood cell, TEM
Basophil white blood cell. Transmission electron micrograph (TEM) of section through a circulating basophil cell. Basophils are the smallest and least common of the white blood cells

Myenteric nerve plexus, TEM
Myenteric nerve plexus. Transmission electron micrograph (TEM) of a section through a bundle of unmyelinated nerve fibres in the myenteric nerve plexus of the intestinal tract

Mesenchymal stem cells, SEM
Mesenchymal stem cells. Coloured scanning electron micrograph (SEM) of two human mesenchymal stem cells (MSCs). MSCs are multipotent stromal (connective tissue)

Golgi membranes, TEM
Golgi membranes. Transmission electron micrograph (TEM) of a section through a cell, showing the membranes (dark lines) of the Golgi apparatus

Goblet cell, TEM
Goblet cell. Transmission electron micrograph (TEM) of a section through a goblet cell in the lining (epithelium, top) of the small intestine

Smooth muscle of gut wall, TEM
Smooth muscle of gut wall. Transmission electron micrograph (TEM) of a section through the outermost wall of the intestine

Lymphocyte white blood cell, TEM
Lymphocyte white blood cell. Transmission electron micrograph (TEM) of a section through lymphocyte, showing the nucleus (large, round, centre), endoplasmic reticulum (ER)

Unmyelinated nerve, TEM
Unmyelinated nerve. Transmission electron micrograph (TEM) of a section through axon (nerve fibre) bundles of unmyelinated nerves

Steroid secreting cell, TEM
Steroid secreting cell. Transmission electron micrograph (TEM) of a section through a cell involved with steroid synthesis and secretion (steroidogenesis)

Enterocyte, TEM
Enterocyte. Transmission electron micrograph (TEM) of a section through the cytoplasm and part of the nucleus of an enterocyte cell located in a crypt of Lieberkuhn of the small intestine

Islet of Langerhans, TEM
Islet of Langerhans. Transmission electron micrograph (TEM) of a section through cells clustered in an islet of Langerhans in the pancreas

Capillary, TEM
Capillary. Transmission electron micrograph (TEM) of a section through a capillary, showing two red blood cells (erythrocytes, black) in its interior

Kidney mitochondria, TEM
Kidney mitochondria. Transmission electron micrograph (TEM) of a section through a kidney tubule, showing numerous mitochondria (blue)

Dividing cell, TEM
Dividing cell. Transmission electron micrograph (TEM) of a section through a cell dividing through the process of mitosis

Myelinated nerve tissue, TEM
Myelinated nerve tissue. Transmission electron micrograph (TEM) of a section through myelinated nerve fibres (axons). Each axon is coated with many layers of myelin

Ovarian follicle, TEM
Ovarian follicle. Transmission electron micrograph (TEM) of a section through an ovary, showing a primary follicle. Primary follicles contain a central oocyte (female germ cell)

Smooth muscle tissue, TEM
Smooth muscle tissue. Transmission electron micrograph (TEM) of a longitudinal section through smooth muscle cells. Smooth muscle cells are spindle-shaped and often closely packed together

Anterior pituitary gland, TEM
Anterior pituitary gland. Transmission electron micrograph (TEM) of a section through cells of the anterior pituitary. The anterior pituitary, or adenohypophysis

Enteroendocrine cell, TEM
Enteroendocrine cell. Transmission electron micrograph (TEM) of a section through an enteroendocrine cell within a gland of the stomach

Cyclin-dependent kinase inhibitor complex. Molecular model of the inhibitor protein P27Kip1 bound to a cyclin-A-cyclin dependent kinase 2 complex

Antibodies and B cells, artwork C016 / 6255
Antibodies and B cells. Computer artwork showing antibodies (green) neutralising cytokine activity in B cell (large, round) white blood cells

Antibodies and B cells, artwork C016 / 6254
Antibodies and B cells. Computer artwork showing antibodies (green) neutralising cytokine activity in B cell (large, round) white blood cells

Drug effect on viruses, conceptual image C016 / 6253
Drug effect on viruses, conceptual image. Computer artwork showing a single strand of DNA (deoxyribonucleic acid, spiral, centre), red blood cells (pink), virus particles (virions, green, small)

Prokaryote cell, artwork C016 / 6263
Prokaryote cell. Computer artwork showing the internal structure of a typical prokaryotic cell. Prokaryotes are organisms whose cells lack a membrane-bound nucleus (karyon)

Eukaryote cell, artwork C016 / 6260
Eukaryote cell. Computer artwork showing the internal structure of a typical eukaryotic cell. Eukaryotes are organisms whose cells contain a membrane-bound nucleus (karyon, orange)

Prokaryote and eukaryote cells, artwork C016 / 6259
Prokaryote and eukaryote cells. Computer artwork comparing typical prokaryotic (top) and eukaryotic (bottom) cells. Prokaryotes are organisms whose cells lack a membrane-bound nucleus (karyon)

Effect of oxygen supply on tumour growth C016 / 6256
Effect of oxygen supply on tumour growth. Top: a small blood supply (tubes) means a low level of oxygen is available and the tumour (round) grows slowly

Gastritis, light micrograph C016 / 0508
Gastritis. Light micrograph of a section through an inflamed human stomach (gastritis), showing an abnormal accumulation of white blood cells (leucocytes)

Corpus luteum of ovary, light micrograph C016 / 0527
Corpus luteum of ovary. Light micrograph of a section through steroid-secreting luteal cells in the corpus luteum of an ovary. The corpus luteum develops from an ovulated follicle

Appendix, light micrograph C016 / 0510
Appendix. Light micrograph of a section through a human appendix. The appendix is a blind-ending small diameter tubular extension of the gut, arising from the caecum of the large bowel

Retina of the eye, light micrograph C016 / 0528
Retina of the eye. Light micrograph of a section through the retina from a human eye. From top down: nerve fibres of the optic nerve and a blood vessel; several layers of neurons (nerve cells)

Gastritis, light micrograph C016 / 0507
Gastritis. Light micrograph of a section through an inflamed human stomach (gastritis), showing an abnormal accumulation of white blood cells (leucocytes)

Cancellous bone, light micrograph C016 / 0509
Cancellous bone. Light micrograph of a section through cancellous, or spongy, bone. Constructed in a honeycomb-type architecture

Colon polyp, light micrograph C016 / 0512
Colon polyp. Light micrograph of a section through part of a tubulovillous adenoma of the mucosa of the large bowel (colon)

Lens of the eye, light micrograph C016 / 0526
Lens of the eye. Light micrograph of a section through the lens from a human eye. The lens consists of thousands of precisely aligned stacks of fibres seen here end-on

Heart muscle, light micrograph C016 / 0517
Heart muscle. Light micrograph of a section through heart (cardiac) muscle tissue, showing cardiomyocyte muscle cells. These cells have a centrally located nucleus and are branched

Brain glial cells, light micrograph C016 / 0524
Brain glial cells. Light micrograph of a section through brain tissue, showing numerous glial cells (dark). Glial cells, or neuroglia, are non-neural cells of the central nervous system (CNS)

Cirrhosis of liver, light micrograph C016 / 0530
Cirrhosis of liver. Light micrograph of a section through liver tissue, damaged by cirrhosis. Cirrhosis occurs as a result of a range of factors causing damage to liver function

Stratified squamous epithelium C016 / 0534
Stratified squamous epithelium. Light micrograph of a section through stratified squamous epithelium, showing the multiple layers, or strata, that function to resist abrasion of the surface

Nerve ganglion, light micrograph C016 / 0532
Nerve ganglion. Light micrograph of a section through a nerve ganglion of the peripheral nervous system, showing clusters of nerve cell bodies

Myelinated nerve fibres, light micrograph C016 / 0531
Myelinated nerve fibres. Light micrograph of a section through a spinal sensory nerve containing many closely packed axons exhibiting a wave-type appearance

Colon, light micrograph C016 / 0516
Colon. Light micrograph of a section through the mucosa (inner epithelial lining) of the colon (large bowel), showing the typical arrangement of invaginations of columnar epithelial cells forming

Islet of Langerhans, light micrograph C016 / 0514
Islet of Langerhans. Light micrograph of a section through an islet of Langerhans in a pancreas. Scattered throughout the pancreas, the islets are endocrine cells that secrete a range of hormones

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"Cytological Wonders Unveiled: Exploring the Intricacies of Cellular Life" In this captivating journey into the microscopic world, we delve into the realm of cytology, where astonishing discoveries await. From anaesthetic inhibiting an ion channel to mesmerizing light and electron micrographs, each image offers a glimpse into the intricate workings of cells. Firstly, we witness an extraordinary phenomenon as anaesthetic molecules inhibit an ion channel within cells. This interaction sheds light on how these substances affect cellular processes and highlights their potential therapeutic applications. Moving forward, our attention is drawn to HeLa cells captured under a light microscope. The vivid details reveal their complex structures and provide valuable insights for research in various fields such as cancer biology and drug development. Next up is a stunning transmission electron micrograph showcasing the rough endoplasmic reticulum. Its labyrinthine network serves as a hub for protein synthesis and transport within cells, emphasizing its crucial role in maintaining cellular homeostasis. As we shift gears towards artistic representation, dendritic cells take center stage through exquisite artwork. These specialized immune cells play a pivotal role in recognizing foreign invaders and orchestrating immune responses - truly nature's defenders at work. Returning to HeLa cells under another light microscope lens unveils yet another breathtaking display of cellular beauty. Each cell appears like a universe unto itself with intricate organelles working harmoniously to sustain life's delicate balance. The enchantment continues with captivating images capturing mitosis - the process by which one cell divides into two identical daughter cells. Witnessing this dance of chromosomes during cell division provides profound insights into growth, development, and regeneration mechanisms within organisms. Shifting focus from animal to plant life brings us pine pollen grains delicately observed under a light microscope. These tiny particles hold immense significance in plant reproduction dynamics while exhibiting remarkable structural intricacies that aid successful pollination. Further exploring plants' hidden wonders takes us on an enlightening journey through light micrographs of pine and lime tree stems.