A&P 2, Unit 2, Chapter 21 Homework

All lymphocytes originate in the _______ bone marrow.

Red

Put the steps in the lymphatic pathway in the correct order.

1. Lymphatic Capillary 2. Afferent Lymphatic Vessel 3. Lymph Node 4. Efferent Lymphatic Vessel 5. Lymphatic Trunk 6. Collecting Duct 7. Subclavian Vein

Trace the path of lymph from the time it leaves the interstitial spaces to the time it enters the blood.

1. Lymphatic capillaries 2. Afferent lymphatic vessels 3. Lymph nodes 4. Efferent lymphatic vessels 5. lymphatic trunks 6. lymphatic ducts.

Complete each sentence by dragging the proper label into the appropriate position. Not all terms will be used.

Fluid contained inside the lymphatic vessels is referred to as LYMPH and is similar to BLOOD PLASMA in consistency and appearance. Originating distally in the tissues of the body, excess interstitial fluids are taken up by the LYMPHATIC VESSELS which resemble VEINS. Accumulations of lymphocytes embedded in connective tissue networks are called LYMPHATIC TISSUES and can be present in static locations or acutely accumulate in areas of infection. The tonsils, spleen, thymus, and lymph nodes are all examples of LYMPHATIC ORGANS.

Insert the correct words into the sentences to demonstrate your understanding of the movement of fluid into lymphatic capillaries. Not all terms will be used.

Fluid moves into lymphatic capillaries when there is a(n) INCREASE in hydrostatic pressure within the interstitial space. Interstitial hydrostatic pressure RISES as fluid as filtered from the blood capillaries. The higher the interstitial fluid pressure, the GREATER amount of fluid that enters the lymphatic capillary.

Check all that are components of lymph.

Interstitial fluid Solutes Foreign material

Match the lymphatic trunk with the major body region that it drains.

Intestinal Trunks: Drain most abdominal structures. Lumbar Trunks: Drain lower limbs and pelvic organs. Jugular Trunks: Drain head and neck. Bronchomediastinal Trunks: Drain deep thoracic structures. Subclavian Trunks: Drain upper limbs, breasts, and thoracic wall.

What are the anatomic characteristics of lymphatic vessels? Check all that apply.

Larger diameter than blood capillaries Lack a basement membrane. Blind-ended Have anchoring filaments

What are the typical structural parts of a lymph node? Check all that apply.

Lymphatic nodules Afferent and efferent lymphatic vessels Cortex and medulla of a nodule

Insert the correct words into the sentences regarding the characteristics of lymph. Not all terms will be used.

Approximately 15% of the fluid that enters the interstitial space is normally absorbed into lymphatic capillaries. The majority of lymph is composed of WATER AND DISSOLVED SOLUTES. Occasionally lymph can contain metastisized CANCER CELLS.

Insert the correct words into the sentences regarding the locations and function of tonsils.

Palatine tonsils are located in the posterolateral region of the ORAL CAVITY. A pharyngeal tonsil is found in the posterior wall of the NASOPHARYNX. When the pharyngeal tonsil becomes enlarged, it is called ADENIODS. Lingual tonsils are located along the posterior one-third of the TONGUE. Within the tonsils are LYMPHATIC NODULES that help protect against foreign substances.

Classify the tissues and organs as being either primary or secondary lymphatic structures.

Primary Structure Red Bone Marrow Thymus Secondary Structure Tonsils Lymph Nodes Spleen MALT (mucosa-associated lymphatic tissue)

Classify the descriptions into the appropriate categories regarding the two major types of lymphocytes.

T-lymphocytes Migrate to the thymus to mature B-lymphocytes Form in red bone marrow and directly enter the blood

Insert the correct words into the sentences regarding the functions of the spleen. Not all terms will be used.

The spleen functions to filter BLOOD. The white pulp of the spleen contains LYMPHATIC CELLS. The red pulp of the spleen contains MACROPHAGES. The RED PULP serves as a reservoir for platelets.

Insert the correct words into the sentences regarding the structure and the function of the thymus. Not all terms will be used.

The thymus functions in T-LYMPHOCYTE maturation. The thymus consists of TWO lobes. The cortex contains IMMATURE lymphocytes. The inner medulla contains MATURE lymphocytes.

Match the lymphatic organ with its description.

Thymus: Site of T-lymphocyte maturation Lymph node: Filters lymph Spleen: Filters blood; storage of platelets and erythrocytes