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Body Fluids and Circulation — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYBody Fluids and Circulation5 Marks
Question
  1. What is lymph? Write its two functions.
  2. Where are Bicuspid and Tricuspid valves located in human heart.
  3. Name the blood vessels that bring oxygenated blood from lungs to heart.
✓

Answer

  1. Lymph: When blood flows through the capillaries, som water and water-soluble small molecules seer into the tissue spaces to form tissue/ interstitia fluid; the part of the interstitial fluid that enter: the lymphatic system, is called lymph.
Functions:
  1. Fats are absorbed from the alimentary canal through lymph in the lacteals of intestinal villi.
  2. The lymphocytes present in the lymph are responsible for the immune response of the body.
  3. It also carries nutrients, hormones and other metabolites for circulation.
  4. It collects and drains the fluid that seeped out of blood, back into circulation.
  1.  
  • Bicuspid valve guards the opening in the AV septum between the left atrium and left ventricle.
  • Tricuspid valve guards the opening in the AV septum between the right atrium and right ventricle.
  1. Pulmonary veins:

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