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Cells and tissues: types and characteristics - Human histology | Kenhub
Cells and tissues: types and characteristics - Human histology | Kenhub DrPhil 161 Views • 2 years ago

This tutorial is an introduction to the histology of the different tissues in the human body and the cells they are made of. Test yourself on our cells and tissue histology quiz at https://khub.me/jnhny

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A tissue is a group of cells that has a similar structure and acts together to perform one or more specific functions. In this tutorial, we will introduce you to the 4 main types of tissues in the human body: epithelial tissue, connective tissue, muscle tissue and nervous tissue. Epithelial tissue creates protective boundaries and is involved in the diffusion of ions and molecules, whereas connective tissue underlies and supports other tissue types.

Muscle tissue contracts to initiate movement in the body and nervous tissue transmits and integrates information through the central and peripheral nervous systems.

In this video tutorial we will take a closer look at the histology of the main cells and tissues under the microscope.

- 0:33 introduction to histology
- 1:22 epithelial tissue histology and types
- 5:45 function of the basement membrane
- 6:20 connective tissue histology and structure
- 10:53 muscle tissue and types of muscle cells
- 13:11 basics of the nervous system

Want to test your knowledge on the cells and tissues of the human body? Take this quiz: https://khub.me/jnhny

Why don't you jump into the introduction of the cell and its components with our free article next? Find it here: https://khub.me/apv1d

For more engaging video tutorials, interactive quizzes, articles and an atlas of Human anatomy and histology, go to https://khub.me/wcyx7

Thyroid Disease In Pregnancy
Thyroid Disease In Pregnancy samer kareem 12,106 Views • 2 years ago

Hypothyroidism during pregnancy is treated with synthetic thyroid hormone, thyroxine (T4). Postpartum thyroiditis—inflammation of the thyroid gland—causes a brief period of hyperthyroidism, often followed by hypothyroidism that usually goes away within a year. Sometimes the hypothyroidism is permanent.

Advanced periodontal disease.
Advanced periodontal disease. samer kareem 1,806 Views • 2 years ago

Removal of multiple teeth due to advanced periodontal disease.

How to Detect Lung Cancer
How to Detect Lung Cancer samer kareem 1,943 Views • 2 years ago

Screening is looking for cancer before a person has any symptoms. This can help find cancer at an early stage when it may be easier to treat. Lung cancer may have spread by the time a person has symptoms. One reason lung cancer is so serious is because it usually is not found until it has spread and is more difficult to treat. Screening may provide new hope for early detection and treatment of lung cancer. Scientists study screening tests to find those with the fewest risks and most benefits. They look at results over time to see if finding the cancer early decreases a person's chance of dying from the disease.

3D Laparoscopic Appendectomy Surgery
3D Laparoscopic Appendectomy Surgery Scott 26,157 Views • 2 years ago

What Is an Appendectomy? An appendectomy is the surgical removal of the appendix. It’s a common emergency surgery that’s performed to treat appendicitis, an inflammatory condition of the appendix. The appendix is a small, tube-shaped pouch attached to your large intestine. It’s located in the lower right side of your abdomen. The exact purpose of the appendix isn’t known. However, it’s believed that it may help us recover from diarrhea, inflammation, and infections of the small and large intestines. These may sound like important functions, but the body can still function properly without an appendix. When the appendix becomes inflamed and swollen, bacteria can quickly multiply inside the organ and lead to the formation of pus. This buildup of bacteria and pus can cause pain around the belly button that spreads to the lower right section of the abdomen. Walking or coughing can make the pain worse. You may also experience nausea, vomiting, and diarrhea. It’s important to seek treatment right away if you’re having symptoms of appendicitis. When the condition goes untreated, the appendix can burst (perforated appendix) and release bacteria and other harmful substances into the abdominal cavity. This can be life-threatening, and will lead to a longer hospital stay. Appendectomy is the standard treatment for appendicitis. It’s crucial to remove the appendix right away, before the appendix can rupture. Once an appendectomy is performed, most people recover quickly and without complications. Why Is an Appendectomy Performed? An appendectomy is often done to remove the appendix when an infection has made it inflamed and swollen. This condition is known as appendicitis. The infection may occur when the opening of the appendix becomes clogged with bacteria and stool. This causes your appendix to become swollen and inflamed. The easiest and quickest way to treat appendicitis is to remove the appendix. Your appendix could burst if appendicitis isn’t treated immediately and effectively. If the appendix ruptures, the bacteria and fecal particles within the organ can spread into your abdomen. This may lead to a serious infection called peritonitis. You can also develop an abscess if your appendix ruptures. Both are life-threatening situations that require immediate surgery. Symptoms of appendicitis include: stomach pain that starts suddenly near the belly button and spreads to the lower right side of the abdomen abdominal swelling rigid abdominal muscles constipation or diarrhea nausea vomiting loss of appetite low-grade fever Although pain from appendicitis typically occurs in the lower right side of the abdomen, pregnant women may have pain in the upper right side of the abdomen. This is because the appendix is higher during pregnancy. Go to the emergency room immediately if you believe you have appendicitis. An appendectomy needs to be performed right away to prevent complications. What Are the Risks of an Appendectomy? An appendectomy is a fairly simple and common procedure. However, there are some risks associated with the surgery, including: bleeding infection injury to nearby organs blocked bowels It’s important to note that the risks of an appendectomy are much less severe than the risks associated with untreated appendicitis. An appendectomy needs to be done immediately to prevent abscesses and peritonitis from developing. How Do I Prepare for an Appendectomy? You’ll need to avoid eating and drinking for at least eight hours before the appendectomy. It’s also important to tell your doctor about any prescription or over-the-counter medications you’re taking. Your doctor will tell you how they should be used before and after the procedure. You should also tell your doctor if you: are pregnant or believe you may be pregnant are allergic or sensitive to latex or certain medications, such as anesthesia have a history of bleeding disorders You should also arrange for a family member or friend to drive you home after the procedure. An appendectomy is often performed using general anesthesia, which can make you drowsy and unable to drive for several hours after surgery. Once you’re at the hospital, your doctor will ask you about your medical history and perform a physical examination. During the exam, your doctor will gently push against your abdomen to pinpoint the source of your abdominal pain. Your doctor may order blood tests and imaging tests if appendicitis is caught early. However, these tests may not be performed if your doctor believes an emergency appendectomy is necessary. Before the appendectomy, you’ll be hooked up to an IV so you can receive fluids and medication. You’ll likely be put under general anesthesia, which means you’ll be asleep during surgery. In some cases, you’ll be given local anesthesia instead. A local anesthetic numbs the area, so even though you’ll be awake during the surgery, you won’t feel any pain. How Is an Appendectomy Performed? There are two types of appendectomy: open and laparoscopic. The type of surgery your doctor chooses depends on several factors, including the severity of your appendicitis and your medical history. Open Appendectomy During an open appendectomy, a surgeon makes one incision in the lower right side of your abdomen. Your appendix is removed and the wound is closed with stiches. This procedure allows your doctor to clean the abdominal cavity if your appendix has burst. Your doctor may choose an open appendectomy if your appendix has ruptured and the infection has spread to other organs. It’s also the preferred option for people who have had abdominal surgery in the past. Laparoscopic Appendectomy During a laparoscopic appendectomy, a surgeon accesses the appendix through a few small incisions in your abdomen. A small, narrow tube called a cannula will then be inserted. The cannula is used to inflate your abdomen with carbon dioxide gas. This gas allows the surgeon to see your appendix more clearly. Once the abdomen is inflated, an instrument called a laparoscope will be inserted through the incision. The laparoscope is a long, thin tube with a high-intensity light and a high-resolution camera at the front. The camera will display the images on a screen, allowing the surgeon to see inside your abdomen and guide the instruments. When the appendix is found, it will be tied off with stiches and removed. The small incisions are then cleaned, closed, and dressed. Laparoscopic surgery is usually the best option for older adults and people who are overweight. It has fewer risks than an open appendectomy procedure, and generally has a shorter recovery time. What Happens After an Appendectomy? When the appendectomy is over, you’ll be observed for several hours before you’re released from the hospital. Your vital signs, such your breathing and heart rate, will be monitored closely. Hospital staff will also check for any adverse reactions to the anesthesia or the procedure. The timing of your release will depend on: your overall physical condition the type of appendectomy performed your body’s reaction to the surgery In some cases, you may have to remain in the hospital overnight. You may be able to go home the same day as the surgery if your appendicitis wasn’t severe. A family member or friend will need to drive you home if you received general anesthesia. The effects of general anesthesia usually take several hours to wear off, so it can be unsafe to drive after the procedure. In the days following the appendectomy, you may feel moderate pain in the areas where incisions were made. Any pain or discomfort should improve within a few days. Your doctor may prescribe medication to relieve the pain. They might also prescribe antibiotics to prevent an infection after surgery. You can further reduce your risk for infection by keeping the incisions clean. You should also watch for signs of infection, which include: redness and swelling around the incision fever above 101°F chills vomiting loss of appetite stomach cramps diarrhea or constipation that lasts for more than two days Although there’s a small risk of infection, most people recover from appendicitis and an appendectomy with little difficulty. Full recovery from an appendectomy takes about four to six weeks. During this time, your doctor will probably recommend that you limit physical activity so your body can heal. You’ll need to attend a follow-up appointment with your doctor within two to three weeks after the appendectomy.

How Does Inversion Therapy or Hanging Upside Down Help Back Pain?
How Does Inversion Therapy or Hanging Upside Down Help Back Pain? samer kareem 2,239 Views • 2 years ago

Many people report that inversion table therapy is a great way to stretch muscles and ligaments, reduce muscle spasms, and improve circulation. Stretching stimulates the lymph glands to increase the flow of lymphatic fluids; part of the body's waste disposal system. Similarly, cellular health depends on good blood circulation to deliver nourishment and remove waste. Inversion table therapy also helps to relieve motion sickness and stress. In addition, the body becomes more aware of its spatial orientation and balance when the inner ear is stimulated during inversion. Plus, it is not necessary for the body to be positioned completely upside down to gain benefits from inversion therapy! Unlike antigravity boots used with an inversion rack, an adjustable inversion table offers the flexibility to choose the most comfortable angle. Dialogue with Your Doctor Like anything that can affect your health, talk to your doctor before you start using an inversion table. This is important because certain medications and health conditions may make using an inversion table unsafe. Your doctor may recommend against inversion table therapy if you have obesity, a detached retina, fracture, glaucoma, heart condition (circulatory problem), hernia, implanted device, middle ear or eye infection, osteoporosis, are pregnant, or have a spinal injury. There may be other medical conditions not listed that your doctor may view as a contraindication.

How CPAP works
How CPAP works samer kareem 14,664 Views • 2 years ago

CPAP, or continuous positive airway pressure, is a treatment that uses mild air pressure to keep the airways open. CPAP typically is used by people who have breathing problems, such as sleep apnea. CPAP also may be used to treat preterm infants whose lungs have not fully developed.

Eye Intravitreal Injection Technique
Eye Intravitreal Injection Technique Mohamed 13,266 Views • 2 years ago

Intravitreal injection technique used in endophthalmitis, macular degeneration, and other eye diseases

Awake brain surgery (Inside Out longer film)
Awake brain surgery (Inside Out longer film) Scott 482 Views • 2 years ago

Thanks to Ben, Addenbrooke's and neuroscientist Yaara Erez from the University of Cambridge

Immune Responses During a Lupus Flare
Immune Responses During a Lupus Flare samer kareem 2,508 Views • 2 years ago

⁣Immune Responses During a Lupus Flare Video

Vaginal Childbirth Animation
Vaginal Childbirth Animation Mohamed Ibrahim 2,204 Views • 2 years ago

An animation showing vaginal childbirth (delivery)

Baby who was born premature at 24 weeks.
Baby who was born premature at 24 weeks. Scott 33,573 Views • 2 years ago

Meet Toby, the baby who was born premature at 24 weeks. He may be small, but he's definitely a fighter! Share his story.

Tongue Lipoma Removal
Tongue Lipoma Removal Scott 21,376 Views • 2 years ago

Tongue Lipoma Removal

Electroconvulsive therapy
Electroconvulsive therapy samer kareem 3,032 Views • 2 years ago

Electroconvulsive therapy (ECT) is a procedure, done under general anesthesia, in which small electric currents are passed through the brain, intentionally triggering a brief seizure. ECT seems to cause changes in brain chemistry that can quickly reverse symptoms of certain mental illnesses. It often works when other treatments are unsuccessful. Much of the stigma attached to ECT is based on early treatments in which high doses of electricity were administered without anesthesia, leading to memory loss, fractured bones and other serious side effects. ECT is much safer today. Although ECT still causes some side effects, it now uses electric currents given in a controlled setting to achieve the most benefit with the fewest possible risks.

Safety & Efficacy of A New Ointment (pedyphar)  for Diabetic Foot Ulcers
Safety & Efficacy of A New Ointment (pedyphar) for Diabetic Foot Ulcers Mostafa Yakoot 14,809 Views • 2 years ago

A Lecture Presented by Dr. Mostafa Yakoot to Vascular Surgery Congress. TITLE: SAFETY & EFFICACY OF A NEW HONEY OINTMENT (PEDYPHAR) FOR DIABETIC FOOT ULCERS. Based on the original article in JWC by: Yakoot M, Abdelatif M, Etman M.

Cervical Biopsy Overview
Cervical Biopsy Overview samer kareem 6,626 Views • 2 years ago

A cervical biopsy is a procedure that is sometimes done on women during an exam called a colposcopy to remove cervical tissue for examination. It is also called a punch biopsy. It is usually performed when a Pap smear result is either inconclusive or abnormal and a doctor wants to screen further for any cervical dysplasia or cervical cancer.

Tonsil Stone Removal with New Tools
Tonsil Stone Removal with New Tools Scott 24,079 Views • 2 years ago

Tonsil Stone Removal with New Tools

Nose Bleed
Nose Bleed samer kareem 2,541 Views • 2 years ago

Bleeding usually occurs from only one nostril. If the bleeding is heavy enough, the blood can fill up the nostril on the affected side and overflow within the nasopharynx (the area inside the nose where the two nostrils merge), spilling into the other nostril to cause bleeding from both sides. Blood can also drip back into the throat or down into the stomach, causing a person to spit or even vomit blood. Signs of excessive blood loss include dizziness, light-headedness, confusion, and fainting. Excessive blood loss from nosebleeds is rare. Additional bleeding from other parts of the body, such as bleeding gums when brushing teeth, blood in urine or bowel movements, or easy bruising may indicate an inability of the blood to clot. Additional bleeding or easy bruising can be a sign of a more significant medical problem.

Dr. George Hanna   New York Pain Specialist
Dr. George Hanna New York Pain Specialist Robert Pace 1,946 Views • 2 years ago

Our Pain Center is the nation & leading Pain Center featuring award winning Pain Specialists. Our Pain Doctors are Harvard Trained and are experts in Facet Injections, Epidural, Knee Injection, Back Surgery, Knee Surgery, and Orthopedic Surgery.

Laser Cystic Acne and Pimples Extraction
Laser Cystic Acne and Pimples Extraction Scott 21,290 Views • 2 years ago

Laser Cystic Acne and Pimples Extraction

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