The National Center of Excellence in Women's Health and Osher Center for …
The National Center of Excellence in Women's Health and Osher Center for Integrative Medicine at UC San Francisco present lectures to provide practical, easy ways to be proactive with your health. In this episode, Susan Folkman, Director of The UCSF Osher Center, talks about learning ways to manage and cope with stress. (44 minutes)
Although mom controls the oxygen source, the fetus has a couple of …
Although mom controls the oxygen source, the fetus has a couple of clever tricks to get the most oxygen possible! Rishi is a pediatric infectious disease physician and works at Khan Academy.
Crash Course Anatomy & Physiology continues the journey through sensory systems with …
Crash Course Anatomy & Physiology continues the journey through sensory systems with a look at how your sense of hearing works. We follow sounds as they work their way into the ear where they are registered and transformed into action potentials. This mechanism not only helps you hear but also helps maintain your equilibrium.
Chapters: Introduction How Sound Works External Ear Structure & Function Middle Ear Structure & Function Inner Ear Labyrinth Cochlea: Basilar Membrane Cochlea: Organ of Corti Equilibrium: Vestibular Apparatus What Causes Motion Sickness? Review Credits
Students learn about the anatomy of the ear and how the ears …
Students learn about the anatomy of the ear and how the ears work as a sound sensor. Ear anatomy parts and structures are explained in detail, as well as how sound is transmitted mechanically and then electrically through them to the brain. Students use LEGO® robots with sound sensors to measure sound intensities, learning how the NXT brick (computer) converts the intensity of sound measured by the sensor input into a number that transmits to a screen. They build on their experiences from the previous activities and establish a rich understanding of the sound sensor and its relationship to the TaskBot's computer.
The formation of the mammalian heart is a fairly complex process. It …
The formation of the mammalian heart is a fairly complex process. It begins when angiogenic mesodermal cells in the cardiogenic plate coalesce to form the endocardial tubes. The endocardial tubes then fuse to form a single duct, the cardiac tube. This undergoes a process of distension, folding and septation and a four chambered, dual circuit pump is formed . The simple heart seen in fish or amphibians forms via the same path but development ceases at an earlier stage.
Your heart gets a lot of attention from poets, songwriters, and storytellers, …
Your heart gets a lot of attention from poets, songwriters, and storytellers, but today Hank's gonna tell you how it really works. The heart’s ventricles, atria, and valves create a pump that maintains both high and low pressure to circulate blood from the heart to the body through your arteries and bring it back to the heart through your veins. You'll also learn what your blood pressure measurements mean when we talk about systolic and diastolic blood pressure.
Chapters: Introduction: The Heart Structure of the Heart The Heart's Ventricles, Atria, and Valves Arteries & Veins Pulmonary Circulation Loop Systemic Loop Systolic and Diastolic Blood Pressure Review Credits
Today we're talking about the heart and heartthrobs -- both literal and …
Today we're talking about the heart and heartthrobs -- both literal and those of the televised variety. Hank explains how your heart’s pacemaker cells use leaky membranes to generate their own action potentials, and how the resulting electricity travels through the cardiac conduction pathway from SA Node to Purkinje fibers, allowing your heart to contract. He's also going to make you better able to spot inaccuracies in medical dramas by explaining how defibrillators work to reset the rhythm of your heart.
Chapters: Introduction: Cardiac Arrest Cardiac Muscle Tissue Structure Pacemaker Cells - The Brain of Your Heart The Intrinsic Cardiac Conduction System How Defbrilators Work Review Credits
The heart is located in the thoracic cavity in between the lungs, …
The heart is located in the thoracic cavity in between the lungs, 60% of it lying to the left of the median plane. The hearts lateral projection extends from rib 3 to 6. Most of the hearts surface is covered by the lungs and in juveniles it is bordered cranially by the thymus. Caudally the heart extends as far as the diaphragm. Variations in position and size exist among individuals depending on species, breed, age, fitness and pathology. Roughly speaking, the heart is responsible for about 0.75% of the bodyweight.
This lesson describes how the circulatory system works, including the heart, blood …
This lesson describes how the circulatory system works, including the heart, blood vessels and blood. Students learn about the chambers and valves of the heart, the difference between veins and arteries, and the different components of blood. This lesson also covers the technology engineers have developed to repair the heart if it is damaged. Students also understand how the circulatory system is affected during spaceflight (e.g., astronauts lose muscle in their heart during space travel).
Hepatic stellate cells (HSC) can also be referred to as vitamin A-storing …
Hepatic stellate cells (HSC) can also be referred to as vitamin A-storing cells, lipocytes, interstitial cells, fat-storing cells and Ito cells. HSC exist in the space between parenchymal cells and sinusoidal endothelial cells of the hepatic lobule and store 80% of retinoids in the whole body as retinyl palmitate in lipid droplets in the cytoplasm. In physiological conditions, these cells play pivotal roles in the regulation of retinoid homeostasis; they express specific receptors for retinol-binding protein (RBP), a binding protein specific for retinol, on their cell surface, and take up the complex of retinol and RBP by receptor-mediated endocytosis.
In this lesson on the brain's neural networks, students investigate the structure …
In this lesson on the brain's neural networks, students investigate the structure and function of the neuron. They discover ways in which engineers apply this knowledge to the development of devices that can activate neurons. After a review of the nervous system specifically its organs, tissue, and specialized cells, called neurons students learn about the parts of the neuron. They explore the cell body, dendrites, axon and axon terminal, and learn how these structures enable neurons to send messages. They learn about the connections between engineering and other fields of study, and the importance of research, as they complete the lesson tasks.
The hind brain is also called the rhombencephalon and is the brain …
The hind brain is also called the rhombencephalon and is the brain stem that provides the connection between the spinal cord and the rest of the brain. The hind brain contains many vital structures including the Medulla Oblongata, the Pons (the link between the cerebellum, forebrain and mid-brain) and the majority of the cranial nerves, III to XII. In general the brain stem governs essential functions that are carried out sub-consciously via reflexes.
Hindgut fermenters are evolved to eat a herbivorous diet. Such a diet …
Hindgut fermenters are evolved to eat a herbivorous diet. Such a diet includes large quantities of insoluble plant carbohydrates, such as cellulose. Mammals cannot digest these insoluble carbohydrates as they lack the essential enzymes, such as cellulase. However it is important that they do digest these carbohydrates as there is insufficient quantity of soluble carbohydrates in plant material. Some microbes do have the enzymes to digest these insoluble carbohydrates and so hindgut fermenters hold a symbiotic relationship with these microbes. Hindgut fermenters have anatomical adaptations to allow for an expanded microbial population. The products of fermentation are volatile fatty acids. It is important to supply a source of fibre in their diet as it stimulates peristalsis in the gut and prevents a build up of gas.
This book is a guide to the basic histology lab conducted as …
This book is a guide to the basic histology lab conducted as a part of the Queens College, CUNY Biology Department Bio105 General Biology: Physiology and Cell Biology course. This course is the first half our two-part series for biology majors. The actives are designed to be conducted over a single 3-hour lab periods which focus on the relationship of form and function of the cellular and organ level anatomy and physiology. Step by step instructions for each slide set are provided for all the key organs. In addition to the full text of the book, we also provide a checklist form with just the assessment portions of the book. This is to help summarize all the information the student should get from the activity.
An open textbook and photographic tutorial library created and compiled by Word …
An open textbook and photographic tutorial library created and compiled by
Word Count: 29926
(Note: This resource's metadata has been created automatically by reformatting and/or combining the information that the author initially provided as part of a bulk import process.)
Ever wondered why your temperature stays at 98.6 degrees? Learn about homeostasis …
Ever wondered why your temperature stays at 98.6 degrees? Learn about homeostasis and how your body maintains a stable temperature. Created by MIT+K12.
This resource provides a short reading section with experimental data and a …
This resource provides a short reading section with experimental data and a few questions about the text. It was created with standardized assessment in mind and aligned with Next Generation Science Standards.
Word Count: 10668 (Note: This resource's metadata has been created automatically by …
Word Count: 10668
(Note: This resource's metadata has been created automatically by reformatting and/or combining the information that the author initially provided as part of a bulk import process.)
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