Lymphatic System

Part A

Complete the following statements:

1. Lymphatic pathways begin as lymphatic_that merge to form lymphatic vessels.

2. The wall of a lymphatic capillary consists of a single layer of_epithelial cells.

3. Once tissue (interstitial) fluid is inside a lymph capillary, the fluid is called_.

4. Lymphatic vessels contain_that help prevent the backflow of lymph.

5. Lymphatic vessels usually lead to_that filter the fluid being transported.

6. The_is the larger and longer of the two lymphatic collecting ducts.

Part B

Complete the following statements:

1. Lymph nodes contain large numbers of white blood cells called_and macrophages that fight invading microorganisms.

2. The indented region of a bean-shaped lymph node is called the_.

3. _that contain germinal centers are the structural units of a lymph node.

4. The spaces within a lymph node are called lymph_through which lymph circulates.

5. Lymph enters a node through a(an)_lymphatic vessel.

6. The partially encapsulated lymph nodes in the pharynx are called_.

7. The aggregations of lymph nodules found within the mucosal lining of the small intestine are called

8. The lymph nodes in the cervical region are associated with the lymphatic vessels that drain the

9. The lymph nodes associated with the lymphatic vessels that drain the lower limbs are located in the _region.

Part C

Complete the following statements:

1. The thymus is located in the_, anterior to the aortic arch.

2. The hormone secreted by the thymus is called_.

3. The_is the largest of the lymphatic organs.

4. Blood vessels enter the spleen through the region called the_.

5. The sinuses within the spleen contain_.

6. The tiny islands of tissue within the spleen that contain many lymphocytes comprise the

7. The_of the spleen contains large numbers of red blood cells, lymphocytes, and macrophages.

8. _within the spleen function to engulf and destroy foreign particles and cellular debris.

Part D

Lymph node sketch ( x)

Thymus sketch ( x)

Spleen sketch ( x)

Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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