Unit 8 - Blood, Lymphatic and Immune System Key Terms

Question 1

erythrocyte

Answer 1

red blood cell

Question 2

hematopoiesis

Answer 2

blood formation

Question 3

leukocyte

Answer 3

white blood cell

Question 4

plasma

Answer 4

liquid portin of blood containing 90% water

Question 5

platelets

Answer 5

cells responsible for the coagulation of blood, also called thrombocytes

Question 6

hemoglobin

Answer 6

iron containing pigment of red blood cells

Question 7

pathogens

Answer 7

disease-bearing organisms

Question 8

hematoma

Answer 8

swelling or mass of blood caused by break in vessel in organ or tissue, also called a bruise

Question 9

erythrocytosis

Answer 9

too many red cells

Question 10

hemolytic anemia

Answer 10

anemia that develops as a result of excessive loss of erythrocytes

Question 11

lymph

Answer 11

clear, transparent colorless fluid found in lymphatic vessels

Question 12

lymph nodes

Answer 12

small organs in lymphatic system that filter bacteria and other foreign organisms from body fluids

Question 13

spleen

Answer 13

organ that filters microorganisms and old red blood cells from blood

Question 14

thymus gland

Answer 14

endocrine gland that assists body with immune function and development of antibodies

Question 15

tonsils

Answer 15

collection of lymphatic tissue located in the pharynx to combat microorganisms entering the body through the nose or mouth

Question 16

lymphatic vessels

Answer 16

extensive network of vessels that conduct lymph from tissue toward thoracic cavity

Question 17

lymph glands

Answer 17

small organs composed of lymphatic tissue located along the lymphatic vessels

Question 18

T cells

Answer 18

lymphocytes active in cellular immunity

Question 19

passive acquired immunity

Answer 19

immunity that results when a person receives protective substances produced by human or animal

Question 20

active acquired immunity

Answer 20

immunity developing after direct exposure to a pathogen

Question 21

antibody

Answer 21

protein material produced in body as a response to invasion of foreign substance

Question 22

nosocomial infection

Answer 22

infection acquired as a result of hospital exposure