Ravi, the syllabus for Biology for NEET includes the following topics:

Diversity in Living world

Structural Organization in Animal and Plants

Cell Structure and Function

Plant Physiology

Human Physiology

Reproduction

Genetics and Evolution

Biology and Human Welfare

Biotechnology and its applications

Ecology and Environment

Under Human Physiology, Heart functioning is important and so you have to prepare for it as well. You can check the complete syllabus at our page: https://images.careers360.mobi/sites/default/files/NEET-2019-Syllabus-Biology.pdf . To help you with your NEET preparation, we have NEET Knockout packages that you can check at: https://learn.careers360.com/knockout-neet-may/.