Saturday, December 14, 2019
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EN_01309402_0383
EN_01309402_0383

Kidneys and adrenal glands. Illustration of the human kidneys with adrenal glands and ureters. The kidneys form urine by filtering out waste products from the blood. The urine travels down the ureter to the bladder (unseen). On the kidney's top surface is the adrenal gland (yellow). This endocrine gland secretes a variety of hormones. These include adrenaline (epinephrine), the body's stress hormone. Adrenaline increases heart rate, breathing and metabolism to prepare the body for flight or fight. The adrenals also produce corticosteroid hormones which affect carbohydrate metabolism and the sex glands.

EN_01309402_0384
EN_01309402_0384

Kidney and adrenal gland. Illustration of the human kidney with the adrenal gland and ureter. The kidney is one of a pair of organs that form urine by filtering out waste products from the blood. The urine travels down the ureter to the bladder (unseen). On the kidney's top surface is the adrenal gland (yellow). This endocrine gland secretes a variety of hormones. These include adrenaline (epinephrine), the body's stress hormone. Adrenaline increases heart rate, breathing and metabolism to prepare the body for flight or fight. The adrenals also produce corticosteroid hormones which affect carbohydrate metabolism and the sex glands.

EN_01309402_0394
EN_01309402_0394

Kidneys and adrenal glands. Illustration of the human kidneys with adrenal glands and ureters. The kidneys form urine by filtering out waste products from the blood. The urine travels down the ureter to the bladder. On the kidney's top surface is the adrenal gland. This endocrine gland secretes a variety of hormones. These include adrenaline (epinephrine), the body's stress hormone. Adrenaline increases heart rate, breathing and metabolism to prepare the body for flight or fight. The adrenals also produce corticosteroid hormones which affect carbohydrate metabolism and the sex glands.

EN_01309402_0395
EN_01309402_0395

Kidneys and adrenal glands. Illustration of the human kidneys with adrenal glands and ureters. The kidneys form urine by filtering out waste products from the blood. The urine travels down the ureter to the bladder. On the kidney's top surface is the adrenal gland. This endocrine gland secretes a variety of hormones. These include adrenaline (epinephrine), the body's stress hormone. Adrenaline increases heart rate, breathing and metabolism to prepare the body for flight or fight. The adrenals also produce corticosteroid hormones which affect carbohydrate metabolism and the sex glands.

EN_01309402_0396
EN_01309402_0396

Kidneys and adrenal glands. Illustration of the human kidneys with adrenal glands and ureters. The kidneys form urine by filtering out waste products from the blood. The urine travels down the ureter to the bladder. On the kidney's top surface is the adrenal gland. This endocrine gland secretes a variety of hormones. These include adrenaline (epinephrine), the body's stress hormone. Adrenaline increases heart rate, breathing and metabolism to prepare the body for flight or fight. The adrenals also produce corticosteroid hormones which affect carbohydrate metabolism and the sex glands.

EN_01309402_0397
EN_01309402_0397

Kidneys and adrenal glands. Illustration of the human kidneys with adrenal glands and ureters. The kidneys form urine by filtering out waste products from the blood. The urine travels down the ureter to the bladder. On the kidney's top surface is the adrenal gland. This endocrine gland secretes a variety of hormones. These include adrenaline (epinephrine), the body's stress hormone. Adrenaline increases heart rate, breathing and metabolism to prepare the body for flight or fight. The adrenals also produce corticosteroid hormones which affect carbohydrate metabolism and the sex glands.

EN_01309402_0398
EN_01309402_0398

Kidneys and adrenal glands. Illustration of the human kidneys with adrenal glands and ureters. The kidneys form urine by filtering out waste products from the blood. The urine travels down the ureter to the bladder. On the kidney's top surface is the adrenal gland. This endocrine gland secretes a variety of hormones. These include adrenaline (epinephrine), the body's stress hormone. Adrenaline increases heart rate, breathing and metabolism to prepare the body for flight or fight. The adrenals also produce corticosteroid hormones which affect carbohydrate metabolism and the sex glands.

EN_01309402_0399
EN_01309402_0399

Kidneys and adrenal glands. Illustration of the human kidneys with adrenal glands and ureters. The kidneys form urine by filtering out waste products from the blood. The urine travels down the ureter to the bladder. On the kidney's top surface is the adrenal gland. This endocrine gland secretes a variety of hormones. These include adrenaline (epinephrine), the body's stress hormone. Adrenaline increases heart rate, breathing and metabolism to prepare the body for flight or fight. The adrenals also produce corticosteroid hormones which affect carbohydrate metabolism and the sex glands.

EN_01309402_0400
EN_01309402_0400

Kidneys and adrenal glands. Illustration of the human kidneys with adrenal glands and ureters. The kidneys form urine by filtering out waste products from the blood. The urine travels down the ureter to the bladder. On the kidney's top surface is the adrenal gland. This endocrine gland secretes a variety of hormones. These include adrenaline (epinephrine), the body's stress hormone. Adrenaline increases heart rate, breathing and metabolism to prepare the body for flight or fight. The adrenals also produce corticosteroid hormones which affect carbohydrate metabolism and the sex glands.

EN_01309402_0401
EN_01309402_0401

Kidneys and adrenal glands. Illustration of the human kidneys with adrenal glands and ureters. The kidneys form urine by filtering out waste products from the blood. The urine travels down the ureter to the bladder. On the kidney's top surface is the adrenal gland. This endocrine gland secretes a variety of hormones. These include adrenaline (epinephrine), the body's stress hormone. Adrenaline increases heart rate, breathing and metabolism to prepare the body for flight or fight. The adrenals also produce corticosteroid hormones which affect carbohydrate metabolism and the sex glands.

EN_01309402_0411
EN_01309402_0411

Lyme disease tick. Computer illustration of a female Ixodes ricinus tick, a blood-sucking parasite of humans and the principal vector of Lyme disease in Europe. This tick uses specialised mouthparts to pierce the host's skin and hold fast for several days while it swells with blood, increasing in weight by up to 200 times. The female feeds only three times during her life and can survive for years between meals, spending most of the time hidden in vegetation. Mating takes place just before her final meal, after which she drops to the ground and lays thousands of eggs. I. ricinus transmits the bacterium Borrelia burgdorferi to humans, which causes Lyme disease.

EN_01309402_0412
EN_01309402_0412

Lyme disease tick. Computer illustration of female Ixodes ricinus tick, a blood-sucking parasite of humans and the principal vector of Lyme disease in Europe. This tick uses specialised mouthparts to pierce the host's skin and hold fast for several days while it swells with blood, increasing in weight by up to 200 times. The female feeds only three times during her life and can survive for years between meals, spending most of the time hidden in vegetation. Mating takes place just before her final meal, after which she drops to the ground and lays thousands of eggs. I. ricinus transmits the bacterium Borrelia burgdorferi to humans, which causes Lyme disease.

EN_01309402_0413
EN_01309402_0413

Intracellular transport. Computer illustration of vesicles (spheres) being transported along a microtubule by a kinesin motor protein. Kinesins are able to 'walk' along microtubules. Microtubules are polymers of the protein tubulin and are a component of the cytoskeleton.

EN_01309402_0434
EN_01309402_0434

Lyme disease tick. Computer illustration of a female Ixodes ricinus tick, a blood-sucking parasite of humans and the principal vector of Lyme disease in Europe. This tick uses specialised mouthparts to pierce the host's skin and hold fast for several days while it swells with blood, increasing in weight by up to 200 times. The female feeds only three times during her life and can survive for years between meals, spending most of the time hidden in vegetation. Mating takes place just before her final meal, after which she drops to the ground and lays thousands of eggs. I. ricinus transmits the bacterium Borrelia burgdorferi to humans, which causes Lyme disease.

EN_01309402_0435
EN_01309402_0435

Lyme disease tick. Computer illustration of a female Ixodes ricinus tick, a blood-sucking parasite of humans and the principal vector of Lyme disease in Europe. This tick uses specialised mouthparts to pierce the host's skin and hold fast for several days while it swells with blood, increasing in weight by up to 200 times. The female feeds only three times during her life and can survive for years between meals, spending most of the time hidden in vegetation. Mating takes place just before her final meal, after which she drops to the ground and lays thousands of eggs. I. ricinus transmits the bacterium Borrelia burgdorferi to humans, which causes Lyme disease.

EN_01309402_0436
EN_01309402_0436

Lyme disease tick. Computer illustration of a female Ixodes ricinus tick, a blood-sucking parasite of humans and the principal vector of Lyme disease in Europe. This tick uses specialised mouthparts to pierce the host's skin and hold fast for several days while it swells with blood, increasing in weight by up to 200 times. The female feeds only three times during her life and can survive for years between meals, spending most of the time hidden in vegetation. Mating takes place just before her final meal, after which she drops to the ground and lays thousands of eggs. I. ricinus transmits the bacterium Borrelia burgdorferi to humans, which causes Lyme disease.

EN_01303436_0249
EN_01303436_0249

Influenza virus H3N2 strain. 3D illustration showing surface glycoprotein spikes hemagglutinin (orange) and neuraminidase (green) on an influenza (flu) virus particle. Haemagglutinin plays a role in attachment of the virus to human respiratory cells. Neuraminidase plays a role in releasing newly formed virus particles from an infected cell. H3N2 viruses are able to infect birds and mammals as well as humans. They often cause more severe infections in the young and elderly than other flu strains and can lead to increases in hospitalisations and deaths.

EN_01303436_0250
EN_01303436_0250

Influenza virus H3N2 strain. 3D illustration showing surface glycoprotein spikes hemagglutinin (orange) and neuraminidase (green) on an influenza (flu) virus particle. Haemagglutinin plays a role in attachment of the virus to human respiratory cells. Neuraminidase plays a role in releasing newly formed virus particles from an infected cell. H3N2 viruses are able to infect birds and mammals as well as humans. They often cause more severe infections in the young and elderly than other flu strains and can lead to increases in hospitalisations and deaths.

EN_01303436_0251
EN_01303436_0251

Influenza virus H3N2 strain. 3D illustration showing surface glycoprotein spikes hemagglutinin (orange) and neuraminidase (green) on an influenza (flu) virus particle. Haemagglutinin plays a role in attachment of the virus to human respiratory cells. Neuraminidase plays a role in releasing newly formed virus particles from an infected cell. H3N2 viruses are able to infect birds and mammals as well as humans. They often cause more severe infections in the young and elderly than other flu strains and can lead to increases in hospitalisations and deaths.

EN_01303436_0252
EN_01303436_0252

Influenza virus H3N2 strain. 3D illustration showing surface glycoprotein spikes hemagglutinin (orange) and neuraminidase (green) on an influenza (flu) virus particle. Haemagglutinin plays a role in attachment of the virus to human respiratory cells. Neuraminidase plays a role in releasing newly formed virus particles from an infected cell. H3N2 viruses are able to infect birds and mammals as well as humans. They often cause more severe infections in the young and elderly than other flu strains and can lead to increases in hospitalisations and deaths.

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