D, Nicotine and tobacco products are still very much legal
Answer: A
Explanation: because if you learn to fall correctly then you could prevent it.
Answer: General defence system: acts against all pathogens.
2. Specific defence system: attacks particular pathogens.
1. Examples of the general defence system.
Skin: provides a barrier to infection.
Clotting: when skin is broken it prevents entry of pathogens.
Sebaceous glands: found in the skin and produce chemicals that kill bacteria.
Sistem pertahanan umum: bertindak melawan semua patogen.
2. Sistem pertahanan khusus: menyerang patogen tertentu.
1. Contoh sistem pertahanan umum.
Kulit: memberikan penghalang untuk infeksi.
Pembekuan: ketika kulit rusak itu mencegah masuknya patogen.
Kelenjar sebaceous: ditemukan di kulit dan menghasilkan bahan kimia yang membunuh bakteri.
