Wednesday, September 18, 2019
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Medicine (63)

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Pictures

EN_00957730_3353 PHO
An illustration of the key component of the nervous system, the neuron; human brain in the background. Neurons have a large number of extensions called dendrites; branches of the neuron cell body that can be long, or very short to act as chemical message receivers from other neurons. The main extension here is the axon, the purpose of which is to transmit electro-chemical signals from one neuron to another neuron. Long axons are covered by a myelin sheath, a fatty substance that covers the axon and insulates it. Shown here is the connection between one neuron (center) and a foreground neuron body. At the end of the axon ending, the bouton, a synapse with the dendrite of the foreground cell is taking place. Across this synapse, very small neurotransmitters (red) cross this gap into the next neuron, creating the nervous system message transferral system.
EN_00957730_3354 PHO
An illustration of the key component of the nervous system, the neuron; human brain in the background. Neurons have a large number of extensions called dendrites; branches of the neuron cell body that can be long, or very short to act as chemical message receivers from other neurons. The main extension here is the axon, the purpose of which is to transmit electro-chemical signals from one neuron to another neuron. Long axons are covered by a myelin sheath, a fatty substance that covers the axon and insulates it. Shown here is the connection between one neuron (center) and a foreground neuron body. At the end of the axon ending, the bouton, a synapse with the dendrite of the foreground cell is taking place. Across this synapse, very small neurotransmitters (red) cross this gap into the next neuron, creating the nervous system message transferral system.
EN_00957730_3575 PHO
Illustration showing pregnant patient with epidural in place for labor pain relief. Evidence of fever on patien'ts face.
EN_00957730_3655 PHO
Conceptual image of junk food passing through the arteries into the heart.
EN_00957730_3811 PHO
Conceptual illustration depicting the spread of disease throughout the world.
EN_00957730_3812 PHO
Conceptual illustration depicting the spread of disease throughout the world.
! EN_00952097_0882 IKO
Zeros and ones in center of germ cell
EN_00935564_0039 BSI
Birth of love desire. Representation of what it happenning in the brain at the birth of love desire. Blue arrows : The hippocampus (memory area, in yellow) and the amygdala (centre of emotions, in purple) send information to the prefrontal cortex (centre of reasoning and decision-making, in green), that stimulates on its turn the hypothalamus (centre of corporal and hormonal reactions, in blue). The body is bombarded of hormones. Reactions : heart palpitations, red on the cheeks, legs trembling... Red arrows : stimulated by the secretion of dopamine (see level of secretion in the tube on the left of the illustration), the nucleus accumbens (pink area) stimulates the brain and the prefrontal cortex to push for action. Green arrow : The prefrontal cortex (centre of reasoning) moderates the action of the nucleus accumbens.
EN_00914102_0285 VU
A caduceus with capsules and pills with dollar signs -- concept of the high cost of prescription medication.
EN_00914102_4312 VU
Futuristic surgery; removing a growth from the fallopian tubes.
EN_90286236_0272 PHO
Conceptual image representing frequency. Sound byte on a grid moving through an ear.
EN_90286488_0004 PHO
Two cytotoxic T-cells attack a single cancer cell. T-cells are lymphocytes originating in the thymus. They come in a variety of types and play a role in the immune system.
EN_90286488_0003 PHO
Hepatitis C viruses floating in a microscopic space.
EN_90286490_0012 EN
An illustration based on an SEM of the aids virus (HIV) infecting T-Lymphocyte.
EN_90085757_0226 BSI
PHOTO: EAST NEWS/BSIP Recherche d'un vaccin contre le sida. Repr??sentation d'une des recherches pour un vaccin contre le sida. Ce vaccin ?. ADN protA?ge les souris contre le virus. Le principe consiste ?. injecter dans un macrophage de souris des boucles d'ADN contenant les informations pour fabriquer des morceaux de virus (exemple : le harpon lui permettant de se fixer ?. la cellule h??te). Ces morceaux de virus sont pr??sent??s aux lymphocytes T CD4. Activ??s, ces lymphocytes d??clenchent la r??action immunitaire afin d'obtenir des lymphocytes T CD8 m??moires et des quelques anticorps sp??cifiques permettant de d??truire les morceaux de virus s??lectionn??s dans la boucle d'ADN. Research into an AIDS vaccine. Illustration of one type of research into an AIDS vaccine. This DNA vaccine protects mice from the virus. The method: DNA strands containing the information for producing fragments of the virus (ex. the harpoon enabling it to latch on to a host cell) are injected into a mouse microphage. These virus segments are presented to the T CD4 lymphocytes which, activated, trigger an immune response which produces memory T CD8 lymphocytes and a few specific antibodies making it possible to destroy the selected virus segments in the DNA strands.
EN_90085757_0075 BSI
PHOTO: EAST NEWS/BSIP Activation et inhibition de la douleur. Repr??sentation du circuit d'activation (?. gauche) de la douleur et de l'inhibition (?. droite). - Activation : sous l'effet de stimulus nociceptif (blessure, br??lure, inflammation), l'influx nerveux est transmis lentement par les fibres nerveuses au neurone convergent de la moelle ??piniA?re, puis au tronc c??r??bral, ?. l'hypothalamus, thalamus et cortex pour les facteurs congnitifs, directement du tronc c??r??bral au cortex pour les facteurs sensoriels. - Inhibition par stimulus sensoriel tactile au niveau de la peau qui transmet l'influx nerveux au neurone convergent de la moelle ??piniA?re plus rapidement. Ainsi l'information courcircuite celle des sensations douloureuses, et atteint le tronc c??r??bral pour se diffuser dans le cerveau. La sensation de douleur est inhib??e. Pain activation and inhibition. Illustration of the circuit of pain activation (left) and inhibition (right). - Activation: through the effects of a nociceptive stimulus (wound, burn, inflammation, etc.), a nerve impulse is slowly transmitted by the nerve fibers to the spinal wide dynamic range neurons, then to the brain stem, through the hypothalamus, thalamus and cortex, for cognitive factors, or directly to the brain stem, for sensory factors. - Inhibition by sensory tactile stimulus by the skin, which transmits the nerve impulse to the spinal wide dynamic range neurons more quickly. In this way, the information shortcircuits the pain sensations and reaches the brain stem, spreading throughout the brain. Pain is inhibited.
EN_90059643_0001 BSI
PHOTO: EAST NEWS/BSIP FIBROMA UTERUS ILLUSTRATION A uterine fibroma is a benign tumor frequently seen in women aged 30 to 45. It is composed of conjunctive tissue and muscle fibers. It distorts the uterine cavity, sometimes projecting out into it, while remaining attached to the wall by a pedicle.
EN_90059639_0002 BSI
PHOTO: EAST NEWS/BSIP UKLAD LIMFATYCZNY CZLOWIEKA
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PHOTO: EAST NEWS/BSIP GRUCZOL TARCZYCY
EN_90018280_0106 BSI
PHOTO: EAST NEWS/BSIP FERTILIZATION DRAWING Ovulation (the releasing of an ovum by a follicle), fertilization in the tubes, producing an egg, followed by nesting of the egg in the uterus and development of the embryo. Top left, an enlargement, in vignette form, of fertilization (the merging of the egg and the spermatozon), the dividing egg (into 2, 4 and 8 cells). On the right, the vignettes represent the division of the egg into 16 cells, followed by nesting (implantation of the fertilized egg complete in the uterine mucosa) and development of the embryo. Centerpiece : an enlargement of the ovum and the spermatozoon.

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