Lymphatic System: Definitions

Question 1

Afferent lymph vessel

Answer 1

Brings lymph into a lymph node.

Question 2

Antibodies

Answer 2

Made by activated B lymphocytes. Attach to foreign particles and mark them for destruction.

Question 3

Edema

Answer 3

Excess of tissue fluid which causes “swelling” of the tissues.

Question 4

Antigens

Answer 4

“Surface markers” on cells that allow the body to detect its own cells from foreign cells.

Question 5

Efferent lymph vessel

Answer 5

Takes lymph away from a lymph node.

Question 6

interstitial fluid

Answer 6

Also called tissue fluid. Fluid between the tissues.

Question 7

Interstitium

Answer 7

Space between the tissues.

Question 8

Lacteal

Answer 8

A lymph capillary found in the small intestines. Absorbs lipids.

Question 9

Lingual tonsils

Answer 9

Patches of lymphatic tissue located at the base of the tongue.

Question 10

Lymph

Answer 10

Fluid collected from tissues and returned to blood stream.

Question 11

Lymph nodes

Answer 11

Small organs found along the course of lymphatic vessels. Contains channels and sinuses.

Question 12

Lymphatic capillary

Answer 12

The smallest of the lymph vessels. Found in most tissues.

Question 13

Lymphatic organs

Answer 13

Tonsils, thymus, spleen and lymph nodes.

Question 14

Lymphatic vessels

Answer 14

Resemble veins but transport lymph instead of blood.

Question 15

Lymphocytes

Answer 15

A type of wbc that is active in the immune system. T lymphocytes (T cells) and B lymphocytes (B cells) have various roles in immunity.

Question 16

Palatine tonsils

Answer 16

Patches of lymphatic tissue located at the back (posterior) of the oral cavity.

Question 17

Pathogens

Answer 17

Bacteria, viruses, fungi and other microbes that can cause disease.

Question 18

Pharyngeal tonsil

Answer 18

Patch of lymphatic tissue located at the lower portion of the nasal cavity. Also called adenoids.

Question 19

Right lymphatic duct

Answer 19

One of two lymphatic ducts that empty their lymph into the subclavian vein.

Question 20

Spleen

Answer 20

Organ that filters blood but contains lymphatic tissues containing lymphocytes and macrophages.

Question 21

Thoracic duct

Answer 21

Largest lymphatic duct; Empties its lymph into the subclavian vein.

Question 22

Tonsils

Answer 22

Organs that are designed to detect pathogens that we inhale or ingest.

Question 23

Mediastinum

Answer 23

Cavity located between the two pleural cavities. Contains the heart, great vessels of the heart, esophagus, lymph nodes, …

Question 24

Lymphatic Duct

Answer 24

The largest lymph vessels that receive lymph from all other lymph vessels and capillaries. Also called lymph collecting ducts. There are two lymphatic ducts - the right lymphatic duct and the thoracic duct.

Question 25

Subclavian veins

Answer 25

Both on the right and left side under the clavicle run the subclavian veins. These veins empty into the superior vena cava.

Question 26

Abdominal region

Answer 26

Abdomen

Question 27

Axillary region

Answer 27

Armpit

Question 28

Cervical region

Answer 28

Neck

Question 29

Inguinal region

Answer 29

Groin