Peristalsis (perr-ee-STAHL-sis) Squeezing, wave-like muscle contractions Involuntary (automatic) Squeezes food down esophagus, thru intestines, etc How is this like a tube of toothpaste? https://www.youtube.com/watch?v=YJ34Qx6hzJk https://www.youtube.com/watch?v=rJS-Kh5wCQU
Add to handout (somewhere) Keeps acid/stomach contents IN the stomach (normally)
On a scale of 1-10 (1 not at all, 10 extremely) how vital is the esophagus?
2. Vagus Nerve One of the body’s LONGEST nerves From BRAIN (cranial nerve) thru the THORACIC & ABDOMINAL cavities Info from brain to body, and back to brain Greatly influences movement of the throat, activity of the heart & digestive system.
2. Vagus Nerve Affects these 4 examples Heartbeat Breathing Absorption by SI & LI BP
2. Vagus Nerve If OVER-active can > FAINTING (Slowed heart beat > less blood to brain > passing out)
2. Vagus Nerve If UNDER-active can lead to stomach complaints, such as 1.N/V 2.Acid reflux 3.Slow heart rate (pacemakers) 4.Diarrhea
Vasovagal syncope (vay-zoh-VAY-gul SING-kuh-pee) is one of the most common causes of fainting. Vasovagal syncope occurs when your body overreacts to certain triggers, such as the sight of blood or extreme emotional distress. The vasovagal syncope trigger causes a sudden drop in your heart rate and blood pressure. That leads to reduced blood flow to your brain, which results in a brief loss of consciousness. Vasovagal syncope is usually harmless and requires no treatment. But it's possible you may injure yourself during a vasovagal syncope episode. Also, your doctor may recommend tests to rule out more-serious causes of fainting, such as heart disorders. Vasovagal Syncope
3. Sternum, aka breastbone Describe its location The ribs attach to it (FRONT) Clavicle attaches here, too Effects of CPR
3 main parts of the sternum: (See PHOTO) Manubrium Body Xiphoid process
3 main parts of the sternum: (See PHOTO) CPR on the middle section NOT on the xiphoid process Why not?
4. Ribs Bone + cartilage Expand & contract Protect organs (ex lungs, kidneys ) 12 pairs, M=F
Discuss and think about: For some reason, Franklin has no esophagus. How does he get food to his stomach?
Discuss and think about: A few people get so ‘nervous’ and ‘worked up’ about donating blood. When the brain senses their fear, they often throw up and perhaps pass out. From our notes, what could explain this?