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Cholesterol
Cholesterol samer kareem 9,113 Views • 2 years ago

To understand high blood cholesterol (ko-LES-ter-ol), it helps to learn about cholesterol. Cholesterol is a waxy, fat-like substance that’s found in all cells of the body. Your body needs some cholesterol to make hormones, vitamin D, and substances that help you digest foods. Your body makes all the cholesterol it needs. However, cholesterol also is found in some of the foods you eat. Cholesterol travels through your bloodstream in small packages called lipoproteins (lip-o-PRO-teens). These packages are made of fat (lipid) on the inside and proteins on the outside. Two kinds of lipoproteins carry cholesterol throughout your body: low-density lipoproteins (LDL) and high-density lipoproteins (HDL). Having healthy levels of both types of lipoproteins is important. LDL cholesterol sometimes is called “bad” cholesterol. A high LDL level leads to a buildup of cholesterol in your arteries. (Arteries are blood vessels that carry blood from your heart to your body.) HDL cholesterol sometimes is called “good” cholesterol. This is because it carries cholesterol from other parts of your body back to your liver. Your liver removes the cholesterol from your body.

Oxygen transport
Oxygen transport samer kareem 5,813 Views • 2 years ago

The protein inside red blood cells (a) that carries oxygen to cells and carbon dioxide to the lungs is hemoglobin (b). Hemoglobin is made up of four symmetrical subunits and four heme groups. Iron associated with the heme binds oxygen.

Heart
Heart samer kareem 13,193 Views • 2 years ago

The heart is the body's engine room, responsible for pumping life-sustaining blood via a 60,000-mile-long (97,000-kilometer-long) network of vessels. The organ works ceaselessly, beating 100,000 times a day, 40 million times a year—in total clocking up three billion heartbeats over an average lifetime. It keeps the body freshly supplied with oxygen and nutrients, while clearing away harmful waste matter.

Bladder cancer
Bladder cancer samer kareem 11,243 Views • 2 years ago

The bladder is a hollow organ in the lower abdomen (pelvis). It collects and stores urine produced by the kidneys. The bladder is connected to the kidneys by a tube from each kidney called a ureter. When the bladder reaches its capacity of urine, the bladder wall contracts, although adults have voluntary control over the timing of this contraction. At the same time, a urinary control muscle (sphincter) in the urethra relaxes. The urine is then expelled from the bladder. The urine flows through a narrow tube called the urethra and leaves the body. This process is called urination, or micturition.

Cosmetic Eye and Eyelid Surgery
Cosmetic Eye and Eyelid Surgery samer kareem 15,972 Views • 2 years ago

Cosmetic Eye and Eyelid Surgery

Why Does Thinking Hard Make You Tired?
Why Does Thinking Hard Make You Tired? samer kareem 6,505 Views • 2 years ago

Why Does Thinking Hard Make You Tired?

Wound clean
Wound clean samer kareem 50,720 Views • 2 years ago

wound clean from pus

Rupture of Achilles Tendon Repair
Rupture of Achilles Tendon Repair samer kareem 10,079 Views • 2 years ago

an incision made on the back of the lower leg starting just above the heel bone. After the surgeon finds the two ends of the ruptured tendon, these ends are sewn together with sutures. The incision is then closed. Another repair method makes a small incision on the back of the lower leg at the site of the rupture.

Ehlers-Danlos Syndrome
Ehlers-Danlos Syndrome samer kareem 12,752 Views • 2 years ago

Ehlers-Danlos syndrome is a group of disorders that affect the connective tissues that support the skin, bones, blood vessels, and many other organs and tissues. Defects in connective tissues cause the signs and symptoms of Ehlers-Danlos syndrome, which vary from mildly loose joints to life-threatening complications. Previously, there were more than 10 recognized types of Ehlers-Danlos syndrome, differentiated by Roman numerals. In 1997, researchers proposed a simpler classification that reduced the number of major types to six and gave them descriptive names: the classical type (formerly types I and II), the hypermobility type (formerly type III), the vascular type (formerly type IV), the kyphoscoliosis type (formerly type VIA), the arthrochalasia type (formerly types VIIA and VIIB), and the dermatosparaxis type (formerly type VIIC). This six-type classification, known as the Villefranche nomenclature, is still commonly used. The types are distinguished by their signs and symptoms, their underlying genetic causes, and their patterns of inheritance. Since 1997, several additional forms of the condition have been described. These additional forms appear to be rare, affecting a small number of families, and most have not been well characterized.

Early Signs that Cancer is Growing in Your Body
Early Signs that Cancer is Growing in Your Body samer kareem 19,463 Views • 2 years ago

Early Signs that Cancer is Growing in Your Body

Menstrual cycle
Menstrual cycle samer kareem 22,936 Views • 2 years ago

The menstrual cycle is the regular natural change that occurs in the female reproductive system like the uterus and ovaries that make pregnancy possible. The cycle is required for the production of ovocytes, and for the preparation of the uterus for pregnancy.

Myelodysplastic syndromes
Myelodysplastic syndromes samer kareem 7,253 Views • 2 years ago

Myelodysplastic syndromes are a group of cancers in which immature blood cells in the bone marrow do not mature or become healthy blood cells. In a healthy person, the bone marrow makes blood stem cells (immature cells) that become mature blood cells over time.Aug 12, 2015

Kyphosis
Kyphosis samer kareem 7,636 Views • 2 years ago

Kyphosis, also known as a round back or hunchback, is a condition in which the spine in the upper back has an excessive curvature. The upper back, or thoracic region of the spine, is supposed to have a slight natural curve.

The Scheuermann's Disease
The Scheuermann's Disease samer kareem 9,188 Views • 2 years ago

The gradual curves of the human spine allow the body to absorb many shocks and stresses in daily life. It’s a delicate balance, though, and if part of the spine curves too much, pain and limited mobility may result.

Asthma and COPD
Asthma and COPD samer kareem 14,003 Views • 2 years ago

Asthma and COPD

Here's Why Your Skin Doesn't Rip Easily
Here's Why Your Skin Doesn't Rip Easily samer kareem 4,793 Views • 2 years ago

Here's Why Your Skin Doesn't Rip Easily

Neuropathic Gait Demonstration
Neuropathic Gait Demonstration samer kareem 4,742 Views • 2 years ago

This type of gait is most often seen in peripheral nerve disease where the distal lower extremity is most affected. Because the foot dorsiflexors are weak, the patient has a high stepping gait in an attempt to avoid dragging the toe on the ground.

Narcolepsy
Narcolepsy samer kareem 10,778 Views • 2 years ago

Narcolepsy is a chronic sleep disorder characterized by overwhelming daytime drowsiness and sudden attacks of sleep. People with narcolepsy often find it difficult to stay awake for long periods of time, regardless of the circumstances. Narcolepsy can cause serious disruptions in your daily routine. Sometimes, narcolepsy can be accompanied by a sudden loss of muscle tone (cataplexy) that leads to weakness and loss of muscle control. Cataplexy is often triggered by a strong emotion, most commonly laughter. Narcolepsy is a chronic condition for which there's no cure. However, medications and lifestyle changes can help you manage the symptoms. Support from others — family, friends, employer, teachers — can help you cope with narcolepsy.

Meningococcal meningitis
Meningococcal meningitis samer kareem 7,051 Views • 2 years ago

Meningococcal meningitis - causes, features, symptoms and treatment

Macular translocation
Macular translocation samer kareem 9,846 Views • 2 years ago

The fovea was moved 425 to 1,700 microm (965+/-262 microm) superiorly or inferiorly. Follow-up time was 2 to 12 months (median 8 months). Complications included macular pucker (3 eyes), subfoveal hemorrhage (2 eyes), macular hole (1 eye), and progression of cataract in phakic eyes (3 eyes). Thirteen of 20 eyes showed various degrees of proliferative vitreoretinopathy with epiretinal membrane formation over the inferior peripheral retina with the inferior retinal detachment stabilized by the silicone oil. One eye progressed to phthisis bulbi. Initial visual acuity ranged from 20/80 to 20/800 (median 20/150) and final visual acuity ranged from light perception to 20/200 (median 20/1000).

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