lab 12

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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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Lab 12 The Lymphatic System BIO202L Insert screenshot of the thoracic duct: Insert screenshot of the axillar lymph node:
Lab 12 The Lymphatic System BIO202L Post-Lab Questions ” 1. Is the cisterna chyli or the spleen more medial to the spinal cord? ” The cisterna chyli is more medial to the spinal cord. ” 2. What is the name of the most superior lymph nodes in the head region? ” Occipital node ” 3. Where are the popliteal nodes located? ” knee ” 4. What are the most inferior lymph nodes in the body called? ” Inguinal lymph nodes ” 5. What component of the lymphatic system filters lymph from the upper limbs and upper external prat of the thorax? The right lmpphatic duct, subclavian trunk, and the thoracic duct drains lymph from the upper external part of the thorax. Experiment 3: Fetal Pig Dissection: The Lymphatic System ” Insert photo of your pig’s exposed spleen with your name and access code handwritten clearly in the background: “
Lab 12 The Lymphatic System BIO202L Post-Lab Questions 1. What observations did you make regarding the lymphatic system of the fetal pig? The system has some things in common with the human body. 2. Compare and contrast the vessels of the lymphatic system and the circulatory system. Both systems lack a microbiota and they are home to many compenents of the host immune defenses. The circulatory vessel moves blood throughout the body while the lymphatic system moves fluid from the intersitial spaces of tissue toward the circulatory system and filters the lymph.
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