§Bronchioles §Alveoli (gas exchange) Characteristics of a good respiratory organ §1. thin §2. moist §3. impregnated with blood vessel §4. elastic and highly distensible §5. large surface area §Respiratory Mucosa §Respiratory epithelium plus supporting connective tissue with mucous glands §Lines nasal cavity and most of airways §Goblet and gland cells secrete mucus §Mucus traps inhaled dirt‚ pathogens‚ etc. §Ciliated cells sweep the mucus out of the airways into pharynx
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tonsils. The inhaled air then passes to the larynx‚ trachea‚ and bronchi. The bronchi lead to the bronchioles in the lungs. In the lungs the pleural membrane facilitates breathing. The bronchioles end in microscopic alveoli lined by a thin‚ moist epithelium. The alveoli is the primary site of gas exchange. Branches of the pulmonary arteries send oxygen poor blood to the alveoli; branches of the pulmonary veins transport oxygen rich blood from the alveoli back to the heart. Inspiration (the process
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for yourself and make sure they are both thoroughly washed and dried. 2. Remove the single layer of epidermal cells from the inner (concave) side of the scale leaf (The thinner the better). 3. Place the single layer of onion cell epithelium on a glass slide. Make sure that you do not fold it over or wrinkle it. 4. Place a drop of iodine stain on your onion tissue. 5. Put the cover slip on the stained tissue and gently tap out any air bubbles. 6. Observe the
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connective tissue layer. 6. The function of epithelial goblet cells is to secrete _substances used in digestion_. 7. _Enteroendocrine_ cells of the mucosa secrete hormones into the blood. 8. Absorption of nutrients occurs through the mucosal epithelium and into either _blood capillaries_ or _lymph vessels_ vessels. 9. Using the following diagram‚ label the vessels you listed in the previous question. 10. The built-in (intrinsic) network of nerve cells in the submucosa is the _submucosal
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Describe the microscopic anatomy of the urinary system (especially the type of epithelium). 4. What is a nephron? What is the difference between the two types of nephrons? g. Nephron – structural and functional units that form urine h. Types i. Cortical nephrons – makes up 85% of nephrons; located in cortex
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30].Activation of STAT6 by IL-4 and IL13 to mediate the pathogenesis of allergic disorders [38‚ 54]‚ epithelial cells have been recognized as major effectors in initiating EoE‚ both through their recruitment of iNKT cells towards the esophageal epithelium‚ the thymic stromal lymphpoeitin (TSLP) gene and its receptor appear to be a risk
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Structure and Function of the Human Digestive System By Caitlin Ong Organs of the Digestive System Mouth Structure: The mouth consists of the upper and lower jaw‚ that contain gums which hold teeth‚ the roof of the mouth is the palate and the tongue occupies the floor of the mouth. The salivary glands have ducts that open in the mouth. Function: The mouth is where the first step of digestion begins. Known as mechanical digestion‚ this involves chewing with your teeth to break the food
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Introduction The topic I chose to research was Polycystic Ovary Syndrome. Polycystic is a health problem that can affect a women’s menstrual cycle‚ childbearing‚ hormones‚ and other bodily functions. Women with this disorder typically have higher levels of androgens in their bodies. [ (DePaolo‚ 2007) ] In this paper I will first do an overview of the female reproductive system‚ briefly discus the menstrual and ovarian cycle and finally discuss Polycystic Ovary Syndrome. Overview of Female Reproductive
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Adult stem cells have been located in bone marrow‚ peripheral blood‚ bone marrow‚ many organs and tissue‚ skeletal muscle‚ testis‚ and ovarian epithelium. They divide and create new cells naturally‚ but only after the tissue is destroyed by an injury. These stems cells can be taken from fat‚ bone marrow‚ or blood‚ with little to no effect on the person. Since the cells can be taken from the tissue
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The human respiratory system is one of the chief and most important which is very instrumental for survival. Prime function of the respiratory system is breathing. Inhaling oxygen and exhaling carbon dioxide is all that takes plays by function of the respiratory organs. Breathing is a process by which oxygen in the air is brought in to the lungs and further in to close contact with blood. The blood absorbs the oxygen and carries to all parts of the body. Simultaneously blood gives up waste matter
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