Millions of sperms are deposited into the vagina during sexual intercourse. The sperms make their way through the cervix into the uterus and then on to the fallopian tubes. As they swim along this way their numbers decline. Only a few hundred sperm will get close to the egg. During the trip, sperm prepare themselves to meet the egg by subtle alterations of their heads and movement patterns. Once inside the fallopian tube, the sperm attracts the egg by releasing a chemical. The egg is surrounded by a protective covering called the zona pellucida, which allows only one sperm to penetrate it. Once inside the egg, the head of the fertilizing sperm releases its genetic contents, which fuses with the nucleus of the egg. Fertilisation is now complete. Sperm are able to survive for 2-3 days within the female's reproductive tract. The length of the time that a woman's egg can be fertilized by a man's sperm ranges from 12-24 hours.

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cardiac massage intermittent compression of the heart by pressure applied either over the sternum (closed cardiac massage) or directly to the heart through an opening in the chest wall (open cardiac massage). simple massage in the nursing interventions classification, a nursing intervention defined as stimulation of the skin and underlying tissues with varying degrees of hand pressure to decrease pain, produce relaxation, and/or improve circulation.

Histology of Pharyngeal Tonsil

An atrioventricular septal defect (AVSD) is a heart defect in which there are holes between the chambers of the right and left sides of the heart, and the valves that control the flow of blood between these chambers may not be formed correctly

Adenocarcinoma of the Transverse Colon taken by Dr. Julio Murra Saca This is the case of a 42 year-old male, with no significant past medical history presented with abdominal pain and no weight loss was reported. Adenocarcinoma of the colon is a primary cause of mortality and
morbidity in North America and Western Europe. Colonic cancers are the most common GI carcinomas and have the best prognosis. The 5-year survival rate is approximately 50%.
Survival rates may be improved by screening and removal of adenomatous polyps. Almost all colonic cancers are primary adenocarcinomas.

Acanthamoeba keratitis is a rare disease in which amoebae invade the cornea of the eye. It may result in permanent visual impairment or blindness.

Time Management and Work Organization

Histology of Esophagus

Epilepsy surgery is reserved for people whose seizures are not well controlled by seizure medicines. This situation is sometimes called being "medically refractory" or "drug resistant." In children, the definition of medically refractory is even more individualized to the specific child's situation. Surgery may be considered for some children after weeks to months of treatment with seizure medicines.

Testing for the four features of Gerstmann Syndrome in this patient with two separate left sided strokes (left frontoparietal ischaemic stroke followed by left posterior parietal haemorrhagic stroke). He exhibits (i) acalculia, (ii) agraphia, (iii) left-right disorientation, and (iv) finger agnosia. Complicating the issue is his obvious nonfluent aphasia (expressive dysphasia) with paraphasic errors (replacing words with associated words (e.g. says 'fork' instead of 'spoon')) and some comprehension issues.

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Video of the technique and early outcomes of Robotic Assisted Microsurgical Vasectomy Reversal at University of Florida and Shands, Gainesville, Fl, by Dr. Sijo Parekattil.

Most scoliosis surgeons agree that children who have very severe curves (45-50° and higher) will need surgery to lessen the curve and prevent it from getting worse. The operation for scoliosis is a spinal fusion. The basic idea is to realign and fuse together the curved vertebrae so that they heal into a single, solid bone. With the tools and technology available today, scoliosis surgeons are able to improve curves significantly.

Medical students at Johns Hopkins University are getting a real-life birthing experience when a robot goes into labor. Kasey-Dee Gardner reports.

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For more information please visit: https://www.yalemedicine.org/c....onditions/acl-injury

Serious injuries, by and large, cause a lot of swelling in the knee. Especially in younger patients. Now, someone could be arthritic and they overdo it going for a big long hike and they get some swelling the next day. But rapid onset of swelling, it's like hard to make out where your kneecap is, is a pretty big cardinal sign that there's something serious that's happened to your knee. Rapid onset swelling is usually due to blood in the joint. "A meniscus that really tears and flips in the front. You tear your quad or your patellar tendon, your kneecap dislocates, you tear a little blood vessel, your ACL tears, a piece of cartilage in bone gets knocked off and causes bleeding. So a lot of the really significant injuries, people get rapid onset swelling within three to four hours and they should seek attention There's always exceptions to rules, but if your knee looks like a grapefruit, you should go get it checked.

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Stop Nose Bleeds by Cautery