A p2 lab 12 - Straighterline A&P lab 12 PDF

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Straighterline A&P lab 12...

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Lab 12 The Lymphatic System

BIO202L

Student Name: Click here to enter text. Access Code (located on the lid of your lab kit):

Pre-Lab Questions: ”1. In what areas are lymph nodes clustered? Why is this desirable?” Lymph nodes are clustered in the inguinal nodes in groin, cervical nodes in the neck, and axillary nodes in the armpit. This is desirable because cells of the immune system get 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 forced through the vessels by the movements of the body, the contraction of skeletal muscles during body movements, and breathing. Semi-lunar valves in lymphatic vessels keep the lymph moving toward 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- Lymphoid Follicles B- Germinal Centers C- Connective tissue capsule D- Medullary cords 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 vessels attached to a lymph node. By having fewer efferent vessels attached to a lymph node, there is more time for the generation of an immune response and its cleansing. ”3. What structural similarities did you observe between the lymph node and spleen? ” Both the lymph node and spleen have a capsule and rounded organs. They both have a structural system that makes fluid flow and filter.

Experiment 2: The Virtual Model – The Lymphatic System Insert screenshot of the spleen:

Lab 12 The Lymphatic System

Insert screenshot of the thoracic duct:

Insert screenshot of the axillar lymph node:

BIO202L

Lab 12 The Lymphatic System

BIO202L

Post-Lab Questions ”1. Is the cisterna chyli or the spleen more medial to the spinal cord? ” Cisterna Chyli ”2. What is the name of the most superior lymph nodes in the head region? ” preauricular lymph nodes ”3. Where are the popliteal nodes located? ” In the region of the popliteal fossa (posterior to the knee) ”4. What are the most inferior lymph nodes in the body called? ” Popliteal lymph nodes ”5. What component of the lymphatic system filters lymph from the upper limbs and upper external prat of the thorax? Axillary lymph nodes

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

Post-Lab Questions 1. What observations did you make regarding the lymphatic system of the fetal pig? Click here to enter text. 2. Compare and contrast the vessels of the lymphatic system and the circulatory system. Click here to enter text.

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