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Vessels and Valves
Primary Immune Organs
Cellular Defense Mechanisms
Miscellaneous
100
What are the smallest lymphatic vessels in the tissue?

Lymphatic capillaries

100

Posterior, lateral, and superior to the stomach, this is the largest organ in the lymphatic system.

The spleen

100

What is the scientific, general term used to describe all white blood cells?

Leukocytes

100

Name 3 lymph node groups

Cervical, axillary, inguinal, pectoral

200

What is the name for the tissue fluid once it leaves the tissues and enters a capillary?

Lymph

200

Located in the upper chest, this organ trains T cells.

Thymus

200

What are macrophages?

Phagocytes that result form monocytes (type of leukocyte). They are produced in the bone marrow and eat pathogens (e.g. bacteria).

200

Why is the immune system so important to homeostasis?

The immune system is a crucial system serving as the body's primary biological defense mechanism towards infections. It does so through inflammatory response, filtering (spleen), and identifying + stopping pathogens (macrophages and other cells).
300

What structures maintain the "flow toward the heart" in larger lymphatic vessels (veins have this structure too)?

One-way valves

300

What are the physical tissue lumps at the back of one's throat that catch pathogens/large dust particles as they are inhaled or swallowed?

The tonsils

300

How do lymph nodes serve as "surveillance" for the body?

Lymph nodes operate as security checkpoints that filter lymph for any trapped pathogens or debris. Inside, B cells create antibodies to signal the immune system to stop the pathogen.

300

Which lymph node group is tightly packed along the sternocleidomastoid muscle?

Cervical lymph nodes

400

Other than one-way valves, what helps lymphatic vessels to keep fluid moving?

Muscle contractions

400

What is the soft tissue inside the cavities of long bones that is the primary site of hematopoeisis, where immune cells are created?

Bone marrow

400

What are lymphocytes? (Including B and T lymphocytes)

A major type of leukocyte that recognize, remember, and destroy specific pathogens to build immunity.

400

This lymphatic vessel drains lymph exclusively from the right quadrant of the body into the right subclavian vein.

Right lymphatic duct

500

What are the microscopic, thread-like fibers that physically anchor lymphatic capillaries to the surrounding tissue cells.

Anchoring filaments

500

What are the small clumps of immune tissue built directly in the walls of one's intestines?

Peyer's patches
500

These specific Y-shaped proteins are secreted by mature B cells to attach to and neutralize/flag specific pathogens.

What are antibodies (or immunoglobulins)

500

This large lymphatic vessel begins at the cisterna chyli in the abdomen and travels upward to empty into the left subclavian vein.

Thoracic duct