Components of blood have different functions.
Complete the table by giving the missing information.
| Component | Function |
|---|---|
| red blood cells | |
| produce antibodies | |
| platelets | |
| transport carbon dioxide, urea, and hormones |
During a secondary immune response, memory cells play a vital role in protecting the body against a pathogen. Describe how memory cells function when a person is re-infected with the same pathogen.
55 exam-style questions on Edexcel IGCSE Biology Transport. Each one has a worked solution and a mark scheme showing where the marks go.