Oxygen because lipids are fats that need oxygen to use long term energy
Answer:
The vascular system
Explanation:
The human blood circularitory system can be used to explain capillary action in the human body, our heart pumps blood in and out with no use of external forces.
Answer:
microscope's condenser
Explanation:
The microscope's condenser is a substage lens that concentrates light on the specimen.
<em>The condenser of a microscope is a structure that helps concentrate light rays from the light source to illuminate the specimen on the stage of the microscope. It is made up of a system of lens that converges the ray of light and an aperture diaphragm that can be used to control the amount of light that gets to the specimen on the stage of the microscope.</em>
