lab 12

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Eastern University *

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201L

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Biology

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Jan 9, 2024

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docx

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Lab 12 The Lymphatic System BIO202L Student Name: Jasmine Johnson Access Code (located on the lid of your lab kit): AC-5ZEMJ1W Pre-Lab Questions: 1. In what areas are lymph nodes clustered? Why is this desirable? Lymph nodes are clustered in the inguinal nodes in goin, cervical nodes in neck, and axillary nodes in the armpit. This is derirable due to cells of the immune system getting more time to work due to the slow flow in these areas. 2. Explain how the flow of lymph is controlled through lymphatic vessels. Lymph is forces through vesses by the movement of the body, the contraction of skeletal muscles during body movements, and breathing. Semi lunar valves in lymphatic vessels keep the lymp moving near the heart. Experiment 1: Examining the Microscopic Anatomy of Lymphatic System Post-Lab Questions 1. Label the items in the following slide pictures based on your observations. A- lmmphoid follicle B- germinal center C- connective tissue capsule D- medulla E- red pulp F- white pulp
Lab 12 The Lymphatic System BIO202L
Lab 12 The Lymphatic System BIO202L 2. Are there more afferent or efferent vessels attached to a lymph node? What is the functional purpose of this? There are more afferent vessel attc=ached to a lymph node. The functional purpose is because the lymph will move slower through the afferent vessels allowing the phagocytes more time to clean. 3. What structural similarities did you observe between the lymph node and spleen? They are both secondary lymphoid organs found in the vertebrate immune system. Experiment 2: The Virtual Model – The Lymphatic System Insert screenshot of the spleen:
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