Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Please start on Question 5.

**Principal Organs of the Lymphatic System**

This diagram illustrates the primary components of the human lymphatic system. Below is a list of the numbered parts and their corresponding anatomical features:

1. **Tonsils**
2. **Thymus Gland**
3. **Spleen**
4. **Thoracic Duct**
5. **Cisterna Chyli**
6. **Lymphatic Vessels**
7. **Inguinal Lymph Nodes**
8. **Axillary Lymph Nodes**
9. **Right Subclavian Vein**
10. **Left Subclavian Vein**

The lymphatic system includes a network of vessels, nodes, and organs that work together to maintain fluid balance, filter pathogens, and support the immune system. Here are brief descriptions of the listed components:

- **Tonsils (1):** Lymphoid tissues located at the back of the throat, involved in protecting against infections.
- **Thymus Gland (2):** Located in the chest, where T-cells mature, playing a crucial role in adaptive immunity.
- **Spleen (3):** An organ that filters blood, recycles old red blood cells, and helps fight infection.
- **Thoracic Duct (4):** The largest lymphatic vessel, which drains lymph from most of the body into the bloodstream.
- **Cisterna Chyli (5):** A large sac-like structure that serves as a storage area for lymph, located at the beginning of the thoracic duct.
- **Lymphatic Vessels (6):** A network of capillaries and larger vessels that transport lymph throughout the body.
- **Inguinal Lymph Nodes (7):** Nodes located in the groin area, involved in filtering lymph and fighting infections.
- **Axillary Lymph Nodes (8):** Lymph nodes in the armpit, important for filtering lymph from the upper limbs and chest.
- **Right Subclavian Vein (9) and Left Subclavian Vein (10):** Blood vessels that return filtered lymph fluid into the circulatory system.

This diagram serves as a visual aid for understanding the distribution and key structures of the lymphatic system within the human body.
Transcribed Image Text:**Principal Organs of the Lymphatic System** This diagram illustrates the primary components of the human lymphatic system. Below is a list of the numbered parts and their corresponding anatomical features: 1. **Tonsils** 2. **Thymus Gland** 3. **Spleen** 4. **Thoracic Duct** 5. **Cisterna Chyli** 6. **Lymphatic Vessels** 7. **Inguinal Lymph Nodes** 8. **Axillary Lymph Nodes** 9. **Right Subclavian Vein** 10. **Left Subclavian Vein** The lymphatic system includes a network of vessels, nodes, and organs that work together to maintain fluid balance, filter pathogens, and support the immune system. Here are brief descriptions of the listed components: - **Tonsils (1):** Lymphoid tissues located at the back of the throat, involved in protecting against infections. - **Thymus Gland (2):** Located in the chest, where T-cells mature, playing a crucial role in adaptive immunity. - **Spleen (3):** An organ that filters blood, recycles old red blood cells, and helps fight infection. - **Thoracic Duct (4):** The largest lymphatic vessel, which drains lymph from most of the body into the bloodstream. - **Cisterna Chyli (5):** A large sac-like structure that serves as a storage area for lymph, located at the beginning of the thoracic duct. - **Lymphatic Vessels (6):** A network of capillaries and larger vessels that transport lymph throughout the body. - **Inguinal Lymph Nodes (7):** Nodes located in the groin area, involved in filtering lymph and fighting infections. - **Axillary Lymph Nodes (8):** Lymph nodes in the armpit, important for filtering lymph from the upper limbs and chest. - **Right Subclavian Vein (9) and Left Subclavian Vein (10):** Blood vessels that return filtered lymph fluid into the circulatory system. This diagram serves as a visual aid for understanding the distribution and key structures of the lymphatic system within the human body.
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