Canine Lymph Nodes Exam Quiz

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Questions and Answers

Which of the following is NOT a component of the lymphatic system?

Blood vessels (correct)

Lymph nodes

Tonsils

Lymphatic capillaries

What is the function of the lymphatic system?

Producing red blood cells

Transporting oxygen to the cells

Returning interstitial fluid to the bloodstream (correct)

Digesting food

Which organ is not part of the lymphatic system?

Lymph nodes

Liver (correct)

Spleen

Thymus

What does the term 'lympha' mean in Latin?

Water Signup and view all the answers

Where is the thymus located in the body?

Chest Signup and view all the answers

Which organ is part of the lymphoepithelial system and is responsible for storage, release, and concentration of erythrocytes?

Spleen Signup and view all the answers

What are hemal nodes?

Intermediate stage between a lymph node and the spleen Signup and view all the answers

What are lymphatic nodules?

Oval-shaped masses found singly or in clusters Signup and view all the answers

What is the role of MALT in regulating mucosal immunity?

It plays a role in regulating mucosal immunity Signup and view all the answers

What is the function of lymph nodes?

To filter harmful substances in the lymph fluid Signup and view all the answers

Which one of these statements is correct regarding the lymphatic system?

It is formed by a network of vessels that carry lymph Signup and view all the answers

Which one of these statements is correct regarding the location of the shoulder joint?

Dorsal and medial in relation to the wing of the atlas Signup and view all the answers

Which one of these statements is correct regarding the stifle joint?

Caudal to the shoulder joint Signup and view all the answers

Which one of these statements is correct regarding the vascular system?

It is formed by a network of vessels that carry blood Signup and view all the answers

Which one of these statements is correct regarding the immune system?

It is part of the lymphatic system Signup and view all the answers

Which lymph node is palpable at the angle of the jaw, situated caudo-ventrally to the angle of the mandible, and covered by the skin and the cutaneous muscle of the face?

Mandibular Signup and view all the answers

Which lymph node is usually represented by a single lymph node, situated near the base of the ear, close to the temporo-mandibular joint, and covered partly by the parotid salivary gland?

Lateral retropharyngeal Signup and view all the answers

Which lymph node is placed ventral and medial in relation with the wing of the atlas and is palpable on a live dog?

Lateral retropharyngeal Signup and view all the answers

Which lymph node is placed medial to the shoulder joint, in a mass of fat tissue medially to the distal part of the teres major muscle, and is easily palpated through the skin when the forelimb is in anterior extension?

Superficial inguinal Signup and view all the answers

Which lymph node is placed caudal to the stifle joint, on the caudal surface of the gastrocnemius muscle, between the biceps femoris and semitendinosus muscles, and is easily palpable through the skin even though they are embedded in fat tissue?

Popliteal Signup and view all the answers

Which lymph nodes are palpable in dogs?

Mandibular, lateral retropharyngeal, prescapular, proper axillary, accessory axillary, caudal epigastric, superficial inguinal, popliteal Signup and view all the answers

Which lymph nodes are palpable in cats?

Mandibular, lateral retropharyngeal, prescapular, proper axillary, accessory axillary, caudal epigastric, superficial inguinal, popliteal Signup and view all the answers

Can veterinarians palpate all lymph nodes?

No, because they are palpable only in the loose subcutaneous tissues Signup and view all the answers

What is the possible problem if the right mandibular lymph node is enlarged in a dog?

A tooth root abscess involving a tooth on the right side Signup and view all the answers

What is the first thing that can be done in the case of mandibular lymphadenopathy in dogs?

Cytological examination Signup and view all the answers

Study Notes

Components of the Lymphatic System

The lymphatic system includes lymph vessels, lymph nodes, lymphoid organs, and lymph fluid.
Components such as the liver and spleen play roles in immunity but are classified differently from the lymphatic system.

Function of the Lymphatic System

Responsible for transporting lymph, a fluid containing white blood cells, throughout the body.
Plays a critical role in maintaining fluid balance, absorbing dietary fats, and providing immune responses.

Thymus Location

Located in the upper chest, behind the sternum, and between the lungs.
Essential for the development of T lymphocytes (T cells).

Meaning of 'Lympha' in Latin

The term 'lympha' translates to "water" in Latin.

Hemal Nodes

Specialized structures associated with the blood system.
Function similar to lymph nodes but are primarily involved in the circulation of blood and immune function.

Lymphatic Nodules

Small, organized aggregates of lymphoid tissue found in various locations, including mucosal sites.
Help filter lymph and produce immune responses.

Role of MALT

Mucosa-associated lymphoid tissue (MALT) plays a central role in mucosal immunity.
Regulates immune responses against pathogens that enter through mucosal surfaces.

Function of Lymph Nodes

Act as filters for foreign particles and pathogens, containing lymphocytes that respond to infections.
Facilitate the activation of the immune system.

Lymph Nodes in Canines

Specific palpable lymph nodes in dogs:
- Mandibular lymph node: located at the angle of the jaw.
- Prescapular lymph node: near the shoulder joint.
- Popliteal lymph node: caudal to the stifle joint.
Enlargement of the right mandibular lymph node could signify an underlying health issue, like infection or malignancy.

Lymph Nodes in Felines

Cats also have palpable lymph nodes similar to those in dogs, but might present differently clinically.

Palpation of Lymph Nodes by Veterinarians

Veterinarians can palpate major lymph nodes in animals; however, some lymph nodes may be difficult to assess due to size or location.

First Step for Mandibular Lymphadenopathy

Initial assessment may involve examination for infection signs, followed by diagnostics like fine-needle aspirate for cytology.

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Description

Test your knowledge on the examination of palpable lymph nodes in dogs with this quiz. Learn about one of the principal ways cancer spreads and enhance your understanding of veterinary anatomy.