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undigested    
未被市场吸收的

未被市场吸收的

undigested
adj 1: not thought over and arranged systematically in the mind;
not absorbed or assimilated mentally; "an undigested mass
of facts gathered at random"
2: not digested; "undigested food"

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  • Veins: Anatomy and Function - Cleveland Clinic
    What are veins? Veins are blood vessels located throughout your body that collect oxygen-poor blood and return it to your heart Veins are part of your circulatory system They work together with other blood vessels and your heart to keep your blood moving Veins hold most of the blood in your body In fact, nearly 75% of your blood is in your
  • Vein - Wikipedia
    [1] There are three sizes of veins: large, medium, and small Smaller veins are called venules, the smallest of which are called post-capillary venules – microscopic veins that play a major role in microcirculation [2] Veins are often closer to the skin than arteries
  • Veins: Definition, Structure, Types, Functions, Diseases
    Veins are the blood vessels that collect the deoxygenated blood from the various tissues and organs of the body and transport it back to the heart
  • What Are Veins and How Do They Work? - ThoughtCo
    Veins are blood vessels that carry blood from the body to the heart using muscle contractions Veins are divided into four types: pulmonary, systemic, superficial, and deep veins
  • Overview of the Venous System - The Merck Manuals
    Many veins, particularly those in the arms and legs, have one-way valves Each valve consists of 2 flaps (cusps or leaflets) with edges that meet Blood flowing toward the heart pushes the flaps open like a pair of one-way swinging doors
  • Arteries vs. Veins: What’s the Difference? - WebMD
    ‌Arteries and veins (also called blood vessels) are tubes of muscle that your blood flows through Arteries carry blood away from the heart to the rest of the body Veins push blood back to your
  • Vein Care Specialist in Oklahoma | CardioVascular Health Clinic
    Whether you’re hoping to get to the bottom of your leg pain or swelling or want effective, minimally-invasive treatment options for spider or varicose veins, we are here to help Please contact us today to learn more about our vein care options or to schedule a consultation with a vein specialist
  • Varicose veins - Symptoms and causes - Mayo Clinic
    Veins return blood from the rest of the body to the heart To return blood to the heart, the veins in the legs must work against gravity Weakened valves, also called incompetent valves, within the veins might cause varicose veins The weakened valves let blood pool in the veins instead of traveling to the heart
  • Veins are a key player in the body: Heres why - Harvard Health
    Thousands of miles of veins throughout the body bring blood to the lungs to pick up oxygen and nutrients, and get rid of carbon dioxide before returning to the heart to be pumped out again How do veins work, what problems can occur, and how can you keep these vital





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