Lymphatic System Histology Quiz: Test Your Knowledge

Questions and Answers

Which of the following is a component of the lymphatic tissue?

Lymph vessels

What is the chief cellular constituent of lymphatic tissue?

Lymphocytes

Which layer forms the outermost part of lymph vessels?

Tunica adventitia

What is a characteristic of lymph capillaries compared to blood capillaries?

Irregularly shaped Signup and view all the answers

Where do lymph vessels pour lymph into?

Thoracic duct Signup and view all the answers

What are the chief components of the lymphatic system?

Lymphatic system consists of groups of cells, tissues, and organs that monitor internal fluid compartments and react to potentially harmful antigenic substances. Signup and view all the answers

What is the function of lymphatic tissue in the body's defense system?

Lymphatic tissue constitutes the second line of defense against invaders. Signup and view all the answers

What are the characteristics of lymph vessels?

Lymph vessels carry lymph, have wider lumen, pour lymph into the thoracic duct, and are made up of three tunics: intima, media, and adventitia. Signup and view all the answers

How do lymph capillaries differ from blood capillaries?

Lymph capillaries are irregularly shaped and have blind ends, while blood capillaries are narrow, regularly shaped, and form a network from arterioles to venules. Signup and view all the answers

What is the key element in an immune response and the chief cellular constituent of lymphatic tissue?

Lymphocytes are the key element in an immune response and the chief cellular constituent of lymphatic tissue. Signup and view all the answers

Study Notes

Lymphatic System

The lymphatic system monitors internal fluid compartments and reacts to the presence of potentially harmful antigenic substances.
It consists of groups of cells, tissues, and organs that form the second line of defense against invaders.

Lymphatic Tissue

Composed of lymph vessels and lymphoid organs.
Lymphocytes are the chief cellular constituents of lymphatic tissue and play a key role in immune responses.

Lymph Vessels

Carry lymph fluid.
Characterized by a wider lumen compared to blood vessels.
Pour lymph into the thoracic duct.
Have very thin walls composed of three tunics:
Tunic Structure
- Tunica intima: consists of endothelium and a subendothelial layer of loose connective tissue (LCT).
- Tunica media: formed of a smooth muscle layer arranged in a circular manner.
- Tunica adventitia: the outermost layer, formed of LCT.

Comparison of Blood Capillaries and Lymph Capillaries

Blood capillaries:
- Are narrow and regularly shaped.
- Start from arterioles and end in venules.
- Lined by endothelium.
- Have a basement membrane.
- Have pericytes.
Lymph capillaries:
- Similar to blood sinusoids.
- Irregularly shaped.
- Have blind endings.