This group of proteins is activated by a series of reactions, in which one activated chemical then activates another; and promotes inflammation, phagocytosis, and cell lysis:

The air in the conducting zone that does not reach the respiratory zone is called:

T- cells require antigen presentation.

This structure seals the nasopharynx during swallowing:

The two main muscles of inspiration are the diaphragm and the internal intercostal muscles

What structure is labeled with  “A”?

3.1 What were the three main forms of child labour during the Industrial Revolution. (1×2) (2)

Question 4: Refer to Source B and answer the questions that follow:

2.5 Watter een van die volgende pas nie? Die stoomenjin het bygedra tot industriële vooruitgang deur __________. (1)

2.1 Impak van die industriële rewolusie op kinders in die myne en meulens__________. (1)