Answer:
Cells are the basic building blocks of living things. The human body is composed of trillions of cells, all with their own specialised function.
Answer:
Joint - a joint is where two bones articulate
In this case, the femur and tibia form a joint.
Qué significa tener energía? Bueno, piensa en cómo te sientes cuando despiertas por la mañana.
the phospholipids are tightly packed togther and the membrane has a hydrophobic interior.
